“Bwahahahahaha” was a trademark from the comic book series Justice League International when it was written by Keith Giffen. The laugh was most often uttered by Blue Beetle and/or Booster Gold. The best moment was when Guy Gardner (the Green Lantern) got all up in Batman’s face and challenged him and Batman laid him out for the count with one punch.
I’ll probably recreate that moment at some point in the S-Team, but for the time being, feel free to poke more fun at Bald Headless Robot Slick. Everyone else is…