Nightmare Fuel / Biker Mice from Mars

• The flashback sequences for part one of the three-part episode "Once Upon a Time on Mars" ends with Throttle, Vinnie, and Modo being horribly injured. Throttle in particular can be briefly seen with his eye sockets empty and bleeding.
• Jimmy Mack trying to crush Throttle to death in "Road Ravens". Not only he says is something he always wondered if he could do, but you can hear the bones cracking.
  Greasepit: "I wonder if he'll go "pop" or simply "squeak"!".
• The Pits: the first place to be dug up by Limburger before the Biker Mice came to Earth, they became a base for the worst criminals on the planet, giving them a hiding place well beyond the reach of the law. Periodically said criminals resurface to rob banks and stores and kidnap hostages, who are reduced to slaves and forced to work under menace. If someone tries to rebel, they are sentenced to die in the arena against giant robots.
• Stoker's transformations into a rat monster in the 2006 series can be more than a little unsettling.

---