Smosh Games x UUDD: Mari vs Cesaro - Boom Boom Balloon! - Expansion Pack is an upload to the UpUpDownDown channel on August 10, 2017. It acts as as spin off to the Smosh Games' Smosh Game Bang episode Don't Pop The Balloon w/ WWE Superstars.
Smosh Games' Mari pops back over to UpUpDownDown to face off against our resident Clash Royale king, Cesaro, in... Boom Boom Balloon? WITNESS nearly an hour of terror (condensed for your viewing pleasure!) as the duo try to out-science the other to force their opponent into popping their friendly looking balloon friend!
- Mari Vs Cesaro