So if you are in a block of 1x1 with two entities and the second entitie is behind you, you will stupidly constantly hitting it !

You can't break what you are looking because hitbox are too big.

If you fall with a villager in a 1x1 empty block, the only way to go out is to kill villager !
If you fall with a friend in a 1x1 empty block , the only way to go out is your friend disconnect !

For me it was realy stupid, if you can't make breaking what you are looking at because hit box are too big, don't make crossing another entity available ...