How to recover from very awkward and embarassing moments? 20 POINTS!?

Hi so i am mostly getting myself in very very awkward and very very extremely extremely embarassing moments!! I feel so bad when it happens and it takes me ages to forget about it! Like randomly while i'm eating or on the internet i'll think about it!

Most of my very very awkward and embarassing moments happen in school! such as in gym class, in the classroom, in music room, outside in the hall where like everybody is out, girl's bathroom.

JUST ANYWHERE IN SCHOOL ! Hahaha even outside at recess!!

For examples

I will be walking or running and i trip or slip or fall and a lot of people seen it, How do i recover nicely and maturely instead of just getting up and running away rudely? How do i be mature about it and calm and take it easy!

Another thing is what if something or someone hit me like by accident my friend will sometimes hit me like she uses a lot of hand motion and stuff and sometimes hits me in front of my crush or something. How do i recover from that?

A few more!! Sometimes me and my friends do really weird awkward stuff and we love to embarass each other for fun and just all that so sometimes my friend will run her fingers through my hair really deeply and since my hair is super super thick and long and its mostly tangly and sometimes it is actually straight and nice but everybody has those little small knots deep in their hair! #LadyProblems, So anyway her fingers get stuck and its so awkward and she doesn't know how to properly get her fingers out without causing a big scene.

How to recover from that?

THANKS EVERYONE!!!!!! 20 POINTS TO THE BEST ANSWER!!!!