This was a little tricky to shoot because you are not allowed to stray too far from the group; you can't bring a tripod without a permit; you don't get any time to set up. Basically you have to do the "toe-out-in-front" bit, brace your elbows against your chest and hope for the best. Then dance around your toes to get your four level shots and one zenith. Lots of differently colored light (natural, incandencent, flourescent, LED) so you just whitebalance for what you think is the major source and shoot.