USC’s late touchdown vs. UCLA: fair or foul?

From ESPN:

When Matt Barkley kneeled down to end Southern California’s (No. 20 ESPN/USA Today, No. 24 AP) victory in the final minute, UCLA defiantly stopped the clock with a timeout.

So the Trojans let ‘er rip, throwing a long touchdown pass and then celebrating it with a taunting ferocity that brought the Bruins onto the field on the verge of a brawl.

The last 90 seconds of Los Angeles’ 79th crosstown showdown had more action than the first 58 1/2 minutes, even if it was just a few extra fireworks at the close of USC’s workmanlike 28-7 victory Saturday night.

See for yourself the setting:

So the question is: Was that cool for Pete Carroll to do? Was it cool for Neuheisel to call the timeouts? What is the proper response?