Did you know?

[Frank_Stein]

Putting a mousetrap assembly into a bag/box will set it off when someone reaches in, but if you keep it open you can still take things out and put things in without setting it off.

You can also use the mousetrap assembly to instantly detonate grenades rather than waiting for the timer. This is great for when you're being chased as the janitor and you want to slip people with the cleaning grenades.