1.) Run away like a little pussy until the giant cock monsters realise I don't appreciate their company.
2.) Download Gun mod, Download flashlight mod, Tape flashlight to gun, BANG BANG.
Or, if I'm feelin' smart...
3.) Set up The fall-y-Cagey trap (Put a hole in the ground, dump water in it, place TNT in same pattern as the hole on the ground in the roof, above the TNT, place Tons of Gravel/Sand, connect it up with plates and a few Wires. Monster walks on plate. TNT Falls and it's fuse is destroyed from it being exposed to water, because there's nothing supporting the Gravel/Sand, it'll fall, and trap/Suffocate the monster.) YAAH!