This is also known as TPBM. You say something, and the person below you answers and says something to the person below them. Example:
Person 1: TPBM likes chocolate
Person 2: Yes. TPBM has over 100 Webkinz.
Person 3: No. TPBM has a laptop.
Ect. (: I'll start...
TPBM loves the color green.