SIS Building Puns

So, we were passing through a not-so-wonderful part of town, and we drove by an old building with a wooden board with the words

"NO TRES

PASSING"

spray-painted on it like that. My dad pointed to the building and said "Look, you can't walk past that building three times or you'll get shot. No tres passing, si?" I groaned, but I knew that I would've made the same joke in his position.