how many 5-year-olds could you take?

My usual posts seem to be garnering little response, this should be different. This is taken from the forums I frequent over at The Grog Brigade. We sure talk about meaningful things. This so totally reminds me of a conversation my friend Adam and I would have, rules and all. So, tell me:

The question: How many 5 year-olds could you take on at once?

The specifics:

You are in an enclosed area, roughly the size of a basketball court. There are no foreign objects.

You are not allowed to touch a wall.

When you are knocked unconscious, you lose. When they are all knocked unconscious, they lose. Once a kid is knocked unconscious, that kid is "out."

I (or someone else intent on seeing to it you fail) get to choose the kids from a pool that is twice the size of your magic number. The pool will be 50/50 in terms of gender and will have no discernable abnormalities in terms of demographics, other than they are all healthy kids.

The kids receive one day of training from hand-to-hand combat experts who will train them specifically to team up to take down one adult. You will receive one hour of "counter-tactics" training.

There is no protective padding for any combatant other than the standard-issue cup.

The kids are motivated enough to not get scared, regardless of the bloodshed. Even the very last one will give it his/her best to take you down.

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Personally I'm not sure. I'm thinking somewhere in the vicinity of 10-15 - a cup can only protect you so much. Especially if you're picking twice the number I select. All it would take was enough kids going after your hair, scratching, clawing, biting, etc. to bring you down. Since they're 5 they may not be all that coordinated...but I'm thinking that many kids going through that much training could definitely cause enough aggregate pain to bring me down. What about you?