Okay so I take it I can't escape the cave by myself? If so here's how it's going to go down.
First off, I throw the gas bomb out of there. It doesn't help me (I'm already quicker than the cannibals) and it can only hurt me. Then I call the cops, I need them to bring guns in case things get messy. Next up I call the cave company.
Then, I take off my shirt and pants. Yes, I will be naked apart from my kicks but this is life and death. I roll around the sides of the cave so my entire body is covered in that slippery mud stuff, making me hard to catch/very slippery in the hands. I know these two dudes don't have a tenth of the quickness I got so I use that to my advantage. Using my t-shirt, I also roll it in the mud so it becomes heavier and easier to whip.
I back into one side of the cave and make one of the dudes approach me. Then I crouch and use the t-shirt to lash at the dude's ankles. Cause the cave is slippery and he has a high center of gravity, I can trip him. I take him to the ground and grab some mud and shove it in his throat, his nose, heck I'll stuff the whole fool's face with that +%+#.
I then go right at the other guy and take him down. As soon as both are down, I'll tie them both together at the neck and the ankles. Yes, I can lift a 280lb man. As soon as their tied together, I will fill their nose/mouth with the mud so they can't call for help and hopefully they pass out. While they're at it I'll repeatedly kick them in the balls/solar plexus.
Game over.