NEW EVENT night, post ideas

Yo guys, I'm planning on setting up a new event night since we have a community now and i can post different events there. So here is what i was missing from last time, opinions from people, to quick and low organization and no practice on those events we picked to test them out. I know some people already posted their ideas for this event night a while ago but since its coming to Christmas, ill have more time to organize.

below is what i was hoping to get, (please post your ideas and maps to do them on, also classes).

Only going to do "3" class events k guys? Don't want this to last half as long as last time and i want this to be fun.

Pyro:
Basic Idea-I was thinking something along the lines of a "red rover" match

Map- need a decent size straight forward map with some obsticals and such.

Objective- One team will be all spies, other team pyros. The objective is to make it to the other side of the map without dieing as the spy while the pyros have to find and catch the spies. (note: if spy dies he goes spec) the spies that make it to the end will go to level 2 and try and make it back until all the spies are dead in which case the teams a switched and so forth.

Engineer
Basic idea: First team to knock out other engi's wins

Map: Probably Bball cause its open

Objective: All members on a team will be engineer. Each team will then build a line of dispensers that are parallel to the other teams dispensers. There will then be some sort of a count down and on "0" all the teams will build SG's as quickly as possible and the first team to lose all their engineers loses. (if you die go spec), this is supposed to be pretty fun.

The last class
I was not sure what to do, i was at a cross between Sniper wars in "sniper towers, Bball, heavy boxing (people liked that) and other stuff.

Anyway, i only want to do 3 class events. I don't have many ideas so post your stuff below. Everyone's ideas will be tested by AoC on a pre-determined date before the actual event night is made and posted. Those classes are not in stone, those where just my ideas.

pre-test dates for AoC- December 6th
Event night December- December 13th (its what im aiming for)
(those are dates unless people are having problems with them).