What do you do when you act silly?

You know like Something that you frequently do or enjoy..when no ones noticing...but something thats like makes you laugh, evrytime you do that thing you do.. when no ones seeing..lol
It could one thing or a variety of things??
It should definitely be...

something that others do not find silly to be ignored...*..it should be somethign that makes you laugh but no one else gets lol..this is not a riddle..lol just talk about ure sense of humour..in general lol

I'm a big English freak, so I love Life is a Metaphor. I love political humor!

when I wrote this..I was thinking the scenario where when I yelled on a strret loudly with some people around, it would be followed immediately by my mum yelling in the same way as I did lol..whenver I think of this or whenver I do this...it cracks me up loll
But it has to be with lovely mum..thats what makes it so special lol

If its really quiet, I'll just bust out a random noise to make people talk. It worries my mom sometimes, but thats okay... its her fault, she made me. Haha.