Cactus has little pricks on the outside
You take your boots off before you jump on a trampoline.
We don't need an asteroid...
The pricks are on the outside of a porcupine.
A cactus has all the pricks on the outside.
A schoolbus full of children.
He uses a cacti-lator!
Because it's easier to deal with just one prick
Because he's a little prick!
