THHS “Flash Mob” Dance – 2011 Posted on June 23, 2011 by Lauren Christopher The Trabuco Hills graduating class of 2011 did a great “flash mob” dance at the graduation ceremony. They made us wanna …. (Shout!) Kick our heels up and (Shout!) Throw our hands up and (Shout!)… Congrats, Class of 2011! You guys are awesome.