What happens when your friends start to act stupid?

This is life of varied movements.Yes, friends do some times act as mad persons and try to insult us or make some unique actions which really hurts us.We cant avoid as this they have already conducted the action in front of others.These movements shud be given less importance and may be forgotten as we are friends.Move in such a way where your friend does not create any fuss in future.Adjust and move.This is the best.

Perhaps she does this because she is either bashful or simply uncomfortable around people that she is not close to? Bashful people especially are prone to this behavior, I guess it is just easier to act stupid, I don't know. I did this myself as a bashful teenager, and never could figure out why.
Try talking to your friend when you are alone and see what she says about it. Heck, maybe she doesn't even realize she is acting that way.