My oldest two will play wrestle with Littest Pirate and sometimes this means he will sit on Oldest Pirate's face or chest and bounce.
Oldest pirate is nearly 13 and nearly as tall as I am, making him about 5'1". So in other words it's not like he's not capable of gently removing baby brother from on top of him, but he doesn't and will lay there, moaning and groaning.
Or sometimes he or Middle Pirate will sit there and the littlest one will wrap his arms around their necks from behind and try to pull them back which of course means nearly choking them but do they reach up and move his arms? No, they let him squeeze away.
Then laughingly complain 'He was trying to kill us!"
I've lost count of how many times I've said "You do realize YOU are the one older by 10/9 years, right?"