The instructions on the bottle

A programmer had been missing from work for over a week when finally
someone noticed and called the cops. They went round to his flat and broke
the door down. They found him dead in the still running shower with an
empty bottle of shampoo next to his body. Apparently he'd been washing his
hair.

The instructions on the bottle said:

Wet hair
Apply shampoo
Lather
Rinse
Repeat


Source: Michael H.