Yep, blowoff tube with a bubbler jar. It's pretty common for me to get super active ferments that overwhelm the little airlocks. I normally change the blowoff tube out for a little airlock after the first week when it's calmed down, but this time for whatever reason, I left it in.
It's easy...
I just finished a batch and was transferring it to a keg for carbonation. My fermentation tank had a bung with a hose going into my airlock container of water. When I transferred, the vacuum sucked all of my airlock water into the batch before I noticed what was happening. I estimate that 24oz...