self-propelled
-b: this is nice. i just ran two miles and ran out of energy. but apparently i didn’t run out of gas
R.: you were self propelled?
-b: seriously R. i was trying to figure out how i went so long, and now i know: fart powered
R.: well I understand how that goes. I accidentally let one rip at the therapy pool and They thought I had an outboard motor as fast as I went across the pool
-b: created an olympic size whirlpool did you?