A booby trap is an explosive trap, rigged with a wire, that is placed by the bottom of the door.

There's currently two types of booby traps. One with a flashbang and one with a HE grenade.

Triggering a flashbang trap will disorient you for a while, giving the armed suspects a good chance to engage and kill you.

The HE grenade trap is even worse than that. Triggering it most often results in an instant death for everyone close enough to the door.

The first method is using your Mirrorgun. Just use it on the door, look around and it should look something like this:

On dome levels, the trigger wire is a bit out of place and will be very hard to spot with the mirrorgun. So what I like to do is check with the mirror gun, peek and check for traps and then fully open the door.

The second method, which is handy if you don't carry a Mirrorgun, is to peek through the door (Don't fully open it, just open a little crack!). Then you should be able to see a small wire through the doorcrack.

The third method is the most obvious one. If you're standing on the other side of the door, they're quite easy to spot. Just keep an eye on the bottom of the door.

Disarming it is pretty easy actually.

If you're on the side on which the booby trap is on then you can just cut it with your tool. Press F once while looking at the trigger wire to equip your tool then hold F on the wire to disarm it.

If you're on the otherdoor however, things could be a bit more tricky. First you peek-open the door, look at the wire at the bottom and cut it. Be careful to not bump into the door as opening it further might trigger the trap. It would be also wise to inform your squad that there's a booby trap behind the door.