Go Potty
Cry
Get Sick
Pull Santa's Beard
You wouldn't want your kid to have a bathroom accident while sitting on Santa's lap. It could be embarrassing for both your child and Santa.
build a fire
if you were holding in a bowel 'release' or sitting on something hard or uncomfortable.
Sitting on usually indicates you are on something, while at would be near or beside it. So if were on a table, you would be sitting on the table. If you were on a chair beside the table, you would be sitting at the table. Sitting at can also refer to a time something is happening, like: "The parliament is sitting at 2pm".
Its possible, but i wouldnt suggest doing it...
It depends what you are sitting on or in.
honestly it depends on who you are like if you have heart problems or something, and it depends on what you just did
There is no friction when you are sitting. In a car perhaps, friction does act on you while you are sitting. When going round a bend, the friction provided by the seat enable you not to move out of your seat (to a certain extent since sometimes we have to hold on to something so as not to fall out of our seat!)
honestly it depends on who you are like if you have heart problems or something, and it depends on what you just did
Standing
If you are actually sitting in a tree, and your hands are free, there is no reaon why you cannot hold a pen. If, however, you are actually doing something with your hands, you might want to keep the pen in your pocket.
because they are addicted to eating it in bed while flossing their teeth with rocks... true story
Think.