: Use a short, sharp, explosive sound. A long "Booooooo" is spooky; a quick "BOO!" is a heart-stopper. 2. The Boo Programming Language

: Corners, behind doors, or just outside a bathroom are classic "low-guard" zones. Wait for them to be preoccupied (e.g., checking their phone).

A guide to Boo's metaprogramming and extensibility features?