It's no bad luck to walk under a truck.
One is made of plastic and poses a suffocation hazard to small children. The other one contains newspapers.
A tire!
Two. One to hold the ladder and one to screw your mother - I mean light bulb!
Twenty. 1 to hold the bulb 2 to turn the ladder and 17 to be on the guest list.
Because if it walked, it'd get jumped!
One does not simply walk into Mordor
A cheesy pickup line
Hit by a car.