A centipede
A nervous wreck! I first heard this at xmas 1952 (64 years ago) and it still makes me smile.
My mom asked Gravity, I replied.
A plain one.
Because they're all Petra-flied of using the air!
Stop being a centipede." Get it, because the robot has no arms! Hahhahaha, gets me everytime.
Not enough leg room!
A dead centipede.