Rocks Walter White Undies During Game

Walter White and Jesse Pinkman took a break from cooking meth to enjoy the Houston Rockets game on Wednesday ... and they got a special surprise from the mascot -- who threw on a pair of glasses and tighty-whites for the occasion!!

"Breaking Bad" stars Bryan Cranston and Aaron Paul were posted up courtside to check out the home team's matchup with the Charlotte Hornets ... and when the VIP guests waved hello to the crowd via the scoreboard, Clutch showed up in one of Walt's most recognizable looks from the series.

Cranston hilariously reacted to the stunt by shielding his eyes ... and Paul was loving it, clapping as the bear showed off his getup.

Cranston and Paul -- who joined forces with…