PCP is pretty amazing stuff. I actually saw a man beat down 5 police officers and escape custody in the ER. They hit him with their billy clubs, and he just kept trashing them. It completely disinhibits, disengauges, and does away with the pain response.
Check out this video on YouTube. The guy is getting sprayed with pepper spray and really doesn’t even care:
http://www.youtube.com/watch?v=-2A7IsQ83bY
Or perhaps more amusing....
http://www.youtube.com/watch?v=D9oK774QU4E
If I’m not mistaken, PCP is used as elephant and large animal tranquilizer, ingested by humans can yield some pretty spectacular results strength-wise and also cause some pretty unusual behavior.