A motivated BJ Penn is downright scary.

UFC 123 was evident that when Penn is completely committed, he is one of the top pound-for pound fighters in the world. The Hawaiian made quick work of rival Matt Hughes, putting a exclamation point on their trilogy, needing only 21 seconds to him.

As the opening bell sounded, both men took to the center of the Octagon and Penn began to press the action immediately and landed a two-punch combination. Hughes attempted a leg kick but Penn counters. Out of nowhere, Penn landed a right hand that drops Hughes. Penn followed up with a flurry of punches to score the knockout victory.

What's next for BJ Penn?

It's hard to figure out where Penn's mentality is as a fighter, however if his win over Hughes was any indication, Penn might want to continue riding his momentum and compete in the welterweight division. Another win against a quality competitor like Dan Hardy or Jon Fitch could solidify Penn's status in the 170 lb division. However a return back to lightweight division might be more likely.

What's next for Matt Hughes?

While Hughes was riding a three-fight win streak entering his bout with Penn, his last three opponents were hardly considered quality competition. Hughes' career has seen better days and it was evident after UFC 123 that Hughes is no longer a top contender in a division he once ruled.

While it would be no shame to retire after UFC 123, Hughes has more pride than that. It's possible Hughes will look to fight once more before calling it a career.