When it's ajar!
or
When it came time to pay, the skunk didn't have a scent, the deer didn't have a buck so they put the meal on the duck's bill.
or
He was a baaaaaaaaad driver.
or
Buy a deck of cards.
or
Mt Rushmore. They're a rock group.. it's a rock...group
or
He had no patients.
or
If Trump gets Alzheimers his IQ will go up.
or