A quick one.
INT. SWIMMING POOL - DAY
SFX. KIDS PLAYING IN THE WATER
A lifeguard is sat on his big chair looking around.
LIFEGUARD
Oi! No peeing in the pool!
The lifeguard gets down from his chair. Cut to a man stood at the edge of the pool, peeing into the water as if at a urinal. The lifeguard starts walking over to him, the man sees him, shakes, and then quickly walks off.