Barry Switzer runs through smoke onto field

NORMAN, Okla. -- It wasn't immediately clear why. But at the end of the third quarter of Saturday's game against Louisiana Tech, former Oklahoma coach Barry Switzer emerged from the northwest corner tunnel through a cloud of smoke to the cheers of a boisterous -- and somewhat surprised -- Owen Field crowd.

Here was some of the immediate reaction:

After I tweeted out my confusion, OU sports information director Pete Moris clarified the reason: