A couple of weeks ago I was rolling with an instructor at Boulder Grappling Academy – which is always fun (and sometimes painful). This session ended when the instructor executed a baseball/baseball bat choke from knee on belly. I failed to block grips and he snagged a deep hold on my collar – and a second later I emitted a grunt as my collar quickly tightened around my neck. It was an incredibly effective choke.

This is the best video I found demonstrating the technique:

I look forward to learning and blocking this move in the future.