Note 1: This unlocks for everyone who is present in the game when one of the players kill a monkey with the fire trap.
Note 2: Monkey rounds will NOT come by if no one has bought a perk, so be sure that everyone (or at least a few of you have bought a perk).My advice would be to combine this achievement with the other achievement on this map,
A helpful gubblegum is the new one where you get 4 times 1250 points (extra credit). Combine this with a double points and you get 10,000 points, which should be enough to pretty much open up all of the doors you need to open, and get juggernog (not required). Fastest way is to open the first door downstairs, and the next one after that. Then if you go outside, and to your right you can open up a door on your righthand side with a trap next to it. The power can be turned on by going back inside, towards the roof (you do need to open one more door).
Now around round 3-5 the first monkey round will start. Smoke will appear and monkey will land in the map. They will either attack you or one of the perk machines (if you have bought it). Just wait around the trap and when you see a monkey either going for you or towards one of the perk machines (thereby crossing the killing zone of the trap), turn the trap on. If no monkey attack you, just wait, they will probably go for your perks first. Once they've taken those from you they will attack you.
You do need an additional 1000 points to activate the trap!
If you dashboard before you die/ finish your game you keep your gubblegums!