We attended a showcase performance of our high school's a cappella group last week. They had a beatboxing battle and invited audience members to volunteer to go against the group's vocal percussionist. Sterling was quick to volunteer. You can see his performance below. (We edited out most of the other not-so-serious contenders.)
Sterling is pretty reserved at school so a lot of people were surprised at his ability. Someone asked me, "Does he ever do this at home?" Only all the time.
After the competition, we learned that the audio techs were instructed to turn off the sub-woofers during Sterling's turn in an attempt to rig it against him. Nice try. :)
Sorry for the terrible video taping. That would be my fault...