Yeah, that's a pretty good ride to start off with even if you are seasoned. I push my rides to 17 each way if it's nice out. Were you riding hard on the way in?

I agree, may have been too much too soon.

As far as the co-worker... Well the ideas here are really good ones. But I like to return the favor; relentlessly. Not to do something that would cause him trouble at work or harm him or his property.

Here's what I would do. Go out and buy a small jar of honey or heavy syrup. ( A spoonful of honey is great anytime before or after a ride BTW...)

Anyway, when he is not looking, find an inconspicuous place to place just a single small drop of the honey/syrup. Remember, just a little drop. Eventually he will place a body part there, and then the fun begins. They may go wash it off...come back sit down and reapply it to themselves again. The key thing to do is to make sure they do not know you have the evidence. The other is to make sure you place a small enough amount they can't figure where the heck they keep getting something sticky on them. Man I tell you the fun can last several days just on a single drop!

I had a guy I work with replace my splenda in my tupperware shaker with popcorn salt. I couldn't tell the difference. Tasted awful. Swallowed a whole gulp before I knew I had been had.

I'm the only one in the office who knows where the sticky stuff is coming from. My co-worker will eventually need to be committed. He cleans his desk, his chair, his keyboard etc. Everybody thinks he's loosing his mind. Funny as heck, non-harmful (other than the psychosis) and I only do it every once in a while. It's awesome poetic justice.