The tight reg who's visibly tilting after a bad beat is a completely different player for the next 30-60 minutes. His range widens, his sizing gets weird, and he starts playing hands he'd normally muck without thinking.

Why they do it

Even disciplined regs go on mini-tilt at $1/$2. The tell is in the body language - leaning forward, stacking chips aggressively, sighing loud. When you see it, adjust immediately.

The adjustment

Tighten your own range and let him spew into you. Don't bluff him - he's in call-off mode. Just wait for a hand and get paid.

What it's worth

Recognizing a tilting reg and adjusting is where good sessions become great ones. Missing it and playing your default strategy against him leaves real money on the table.