Throwing water balloons at cars from the patio at the Hooters on Williamson?
That's why I don't hang out with that type of crowd. Never known any of them that hang out there to do things like that and don't really understand how they could have filled water balloons without the staff noticing, but I'll ask around anyway and see if anyone knows who it was.
Do you have glass coverage on your insurance policies? If not, look into it for the future. A lot of companies offer a $0 deductible glass coverage for things like that, and it may come in handy next time to have.