I have about six weeks worth of beer brewing knowledge which means I know enough to be dangerous to myself and those around me. That said, I think the consenses will be you need a blow off tube. Remove you air lock, stick tubbing, sanitized I'm sure, into your bubbler hole in the top of the bucket and run the other end of the tubbing into a second container of sanatizing solution. Make sure the "other end" remains below the liquid level to create the air lock. I've even seen where people put the container of blow off liquid into an empty larger bucket just to be safe.
If I were you though, I'd look around for other answers before I believed me, but this is what I'd do.
Edit: thats funny, there were no replys when I started typing, got distracted, came back and posted and theres like 6 replys.