They never carry their own weight.
A mute telling a deaf guy that a blind guy saw a paraplegic running behind a bald guy while grabbing his hair.
Inert gas.
A one trip pony :D
Let's get rational you can't carry on like this!
Thank you, I'm flattened! I made this joke up on my drive home and am very proud of it. You monkeys better find it funny!
Weight on it.