Teacher: Where is your slip so I can see you can come on this trip?
Orphan: Parent signature: ___________
Teacher: Where is your slip so I can see you can come on this trip?
Orphan: Parent signature: ___________
Listen up, you chucklehead! The joke is that the orphan doesn't have parents, so they can't get a parent's signature. It's funny because it's sad! You probably trip over your own feet, don't you?