You eat food? It is me. You play soccer? It is me. You give birth? It is me. You go to work? it is me. You do sex? It is me. You work? It is me (over 99% of times). You solve a crossword? It is me. You use a pistol? It is me. You use a sniper? That's me...but one of the annoying corrections, that's not me. You use a weak bomb? It is me. You use a strong bomb? It is not me. You dropped your pencil? It is not me.
Well, OK, by mentioning your "abstract" actions, maybe the others are cooperating as well. But surely, when you think of the more specific tasks (eg kicking the ball in soccer), I am more prevalent.
The answer is a scientific concept
(I hope I don't initiate a philosophical discussion here ;) )