WARNING: This is not a toy! Improper handling can lead to serious injuries or even death. Use only under adult supervision and in a suitable environment! Bows and crossbows fall under the hunting law, which is why carrying them in public is restricted ->
Safety rules:
Never aim for something you don't want to hit!
Keep your index finger outside the trigger guard until the crossbow is aimed at the target!
Be sure of your goal! - Only shoot at suitable targets! - Pay close attention to what is between you and the target, and what is behind the target! - Expect to miss by a mile, but be focused enough to prevent it from happening!
Never place a finger you want to keep in the path of a cocked crossbow!