I have a Serfa and a Joe blow sport. There's been time where I had to pump 5 bikes for my nephew, their friends, my SO and my bike just before heading out on a group ride. Got tired of pumping those tires and found the best pump so far after a search mission in the old garage. I found my old battery operated pump for my car tires and now I use that most of the time. I use a adapter for my Presta valve. Several nice thing about this pump is that the valve lever is opposite of standard bike pump and I don't lose any air locking the valve head or removing it. It has a built in light which is nice at time. It also can jump start my car battery on morning where I find a flat tube and is in a rush to get out of the house and where I am lazy to transfer my stuff to the other bike

Question: Why is that car tire pumps have the lever pushing down to lock while bicycle pumps are the opposite? What is the idea behind that?