magician or clown?

during lecture today, in an attempt to show the different characteristics of laser, the lecturer brought along a blue laser generator. he placed a blue balloon in front of the generator and turned it on. nothing happened. he later placed a red balloon in front of the generator and....POP! the balloon burst. he next took out another baloon, this time a blue balloon with a red balloon within. when he turned on the laser, guess what happened? POP! went the red balloon within but the blue balloon was still intact. with all the balloons and "magic" tricks, it makes you wonder if the lecturer is putting on a magic show or is missing colourful hair and a red nose.