"Toilet" sign becomes "To let" when a lizard (letter i) moves out.

Long time back, I saw this comedy movie, a traveler goes to a house to relieve himself, saw a "TOILET" sign and sits in a pot. A little later, it shows, a lizard moves out of the "TOILET" sign, which now reads as "TO LET." Actually it was the house of some people and he was sitting in their water pot to relieve himself.