One goes choo-choo the other goes chew-chew.
An ambulance because that is a serious medical emergency that requires immediate attention.
A handshake
BUMBLEGUM. Five year olds think it's hilarious. I do not.
A school teacher tells you to spit out your gum, a train says choo choo.
A Pikachoochoo.
One trains the mind the other minds the train.
A schoolteacher says "Spit out that toffee" and a train says "Choo choo."