I have some talent and i'm willing to trade
I will give out the door glitch for free
You can crush jump on top of doors, if they are accessible annd sit on top of the door ledge and close it.
Even if they kick in the door/shoot it out, you still stay up there, if you have closed it while on it.
But you also act as a blockade for the door, other people cant open it fully when you are up there.
But no damage is taken when the door is kicked in, as i have seen so far.