Bridge over frozen water? Check. Dozens of your closest friends? Check. Lots of rope? Check. Foolhardiness? Check, check, check.
By all accounts, these Russians are having a great time jumping off a bridge en masse, but we can't help but wonder how on earth they're all going to get back up. Surely, the one guy left on the bridge isn't going to yank them up one by one. Or is crashing through the ice at the end part of the fun?
Either way, let this be a lesson to you. You make your own fun.