Let me guess,you were being trained in order to transport William of Normany's troops from France in preperation for the Battle of Hastings.

Frequently by the time I get to the bottom bit in my revolver powder flask it's getting close to ffff. Obviously, steel on steel and bp are a bad mix. Thanks for the warning though. Remember kids, don't try this at home!

AAArrrrrrgggggggghhhhhhhhhhh. The third or fourth thing to go is control of the fingers.

Definitely the third thing I should think- Along with the spell checker and thesaurus.

William of NormanDy ---Is Normally known as "William the Conquerer" over here- Due to his love of Chestnut trees.

George! Thanks! I missed that whole series of posts!

No, but it won't fill your tire either, unless you know exactly what to do. The pressure goes down, not up in the cold. As the cartridge emptys at room temperature they get covered with ice from the gas expansion. That's how air conditioners work.
This means that the nozzle will ice up and the co2 will not fill the tire much any way. Even at plus 25 degrees F it's a problem.
If you put the whole cartride under your coat until it is warm, and act very quickly you can fill a tire (sorta). If you are too slow it ices up. Covering it with a gloved hand helps.

Below freezing, bring a pump.

Don't leave them in the car during the summer, they can explode and blow out the windows.

I use a similar method when I have a flat in sub-freezing temps. The first thing that I do after stopping is stick a cartridge down my tights - no kidding. Then, when I'm ready to air the tire up, out comes the cart, screw it on the inflator and I've got a full tube in a couple of seconds. I've changed several flats in sub-freezing temps using CO2 without a problem.

I don't know about the little bike CO2 cartridges, but air-gun CO2 cartridges will explode very impressively if thrown into a camp fire. That was 30 years ago when I was stupid (more stupid?). I'm lucky I didn't hurt anyone. Shrapnel must have landed over 100 feet from the fire.

Gas pressure increases with temperature. The increase is proportional to the percentage increase of the temperature over absolute zero. Absolute zero is -273 degrees C which is even colder than Minnesota.

So to double the pressure you have to get to from 0 degrees C (freezing point of water), you have to go to 273 degrees C which is something like 400 degrees farenheit. So inflating your tire at low temperatures will not result in dangerously high pressures at shirt sleeve temperatures. Bike tires are generally made to blow off the rim at 2X the recommended pressure (or so I have heard).

PV=nRT Universal gas law.

I found a couple of web sites which contained safety information about CO2 cartridges and they said that they are manufactured to be safe from -30 to +120. They can frequently go outside of those ranges without problems, but one should attempt to keep them within this range.

When you say "visiting," do you mean on the football field, or at your place?

And if it's the latter, are you sure they're almost in tears "from the cold?"

I hope to see some frozen tears on the cheeks of the NY Giants tomorrow.

I certainly try to keep myself within that temperature range.

And some on the New England Patriots as well.

The current prediction for the weather at game time in Green Bay is 0 degrees with a -18 windchill factor.

I know of about 20 of my co-workers who are going to the game.

Will there be many of the no shirt green an yellow painted cheeseheads in the stands?

I'm sure there won't be as many. I am also sure there will still be some.

No, but you may wish...don't worry the outside exposure is limited going between the car and building etc...
By the way, lake riding is fun!!!!

If you are going to downtown Minneapolis, then don't worry. That is the cold weather wuss capitol of the Great North. Every building is connected via heated walkways, there are heated tunnels around, a lot of them at Gopher Wuss University.

Here in Madison there are no heated walkways, or even covered walkways. No tunnels on campus. We even play football outdoors (likewise in Green Bay).

In Minneapolis people go to their heated garages, get into their cars, drive to heated or covered parking lots, take the heated elevators to the heated walkways and walk to their office. At lunch they walk via their heated walkways to restaurants or stores. They never even go outside during the day.

You make it sound like that's a bad thing!

Must admit there have been days when I had to walk across campus into bitter winds blowing off of Lake Mendota when I would have liked the option of a walkway or tunnel.

The were cowering like toddlers in the doorways of buildings on the news....

Pam is going to St. Paul. I don't think there are skyways in St. Paul....

There are a bunch of them in St. Paul too. I've been in some of them.

I should have said Minneapolis-St. Paul is the capitol of cold weather wusses.

https://www.saint-paul.com/maps/skyway.html