Disclaimer: Do not attempt this, you or your bricks could get seriously burned, seriously.
Prepare to have your mind blown LEGO fans. Siercon and Coral have unleashed a slew of MOCs in the last day. But this one, holy cow, a mech with a working flame thrower! Watch the video to see it in action. And check out their photostream for all the amazing last minute MOCs for Iron Builder. These two are machines!