The man indeed flinches, even taking a sharp step back when he sees those fists curling, but his scowl just deepens.

"If I catch your brat again, you'll be seeing 'em next on the other side of a guard's cell, if you're lucky," he growls, but he's backing up as he says it, only turning to leave when he's fully out of the alley, in case Majima makes another move.