take off all its legs?
nastiness.
it has a really important thing to do. it makes it able to sense thing that are very far away from that cockroach
Riahanna ^^ she makes him very angry
Rovio makes Angry Birds.
Pollution makes the Earth angry. At least, in a metaphorical sense.
Hormones
You need to ask again as you question makes little sense.
being bullied
Adrenaline
A cockroach has an exoskeleton which makes it more difficult to stick the pin through its surface and earth worm is just skin like a human being.
a red flag
running out of patients