One goes choo-choo the other goes chew-chew.
Dey both sinna, mon!
Stick it in microwave and turn it on until it's Bill Withers.
Ex-spearmints
Cancer
One trains the mind the other minds the train.
They train them
A schoolteacher says "Spit out that toffee" and a train says "Choo choo."
A school teacher tells you to spit out your gum, a train says choo choo.