I have very eclectic tastes. As I have said before, I'll listen to anything from RDP to DBC. But I have to draw the line somewhere, and that line begins with rap metal. The title of this post may be misleading because it implies that there are fortunate experiments in rap metal, which is not the case. The following are some of the most atrocious examples, but please add your own in the comments.
Anthrax- I'm The Man
Anthrax was a great band from 1985-1989 or so, but this was definitely not their finest moment. This is basically the thrash metal equivalent of the Tracy Jordan film "Honky Grandma Be Trippin'" in which an elderly white woman says things like "Word to your mother!" "Bring The Noize" (or whatever "urban" spelling they use) was better because it had a great riff and Public Enemy, but still pretty bad.
Soulfly- Entire catalog
Well I don't think I need to say much more about this one. But the thing about this band that is really irritating is how the guitarist wears a backpack (with no shirt) on stage. Maybe he is storing supplies in it, such as extra Brazilian flag patches, I don't know. But it needs to stop.
Suicidal Tendencies- everything with Robert Trujillo
We have already discussed his irritating, crab-walking antics with Metallica, but of course it all started with Suicidal Tendencies. To be entirely correct, I guess this falls more into the specific domain of funk-metal more than rap-metal, but it's close enough for our purposes. They used to be a great hardcore band, then a great thrash metal band, then they added slap bass and Mike Muir's incoherent bizarre mumblings about Charles Manson and Froot Loops, and the next thing you know they are announcing a new side project called Infectious Grooves. Oh my.
Atheist- "Earth" from Elements
Atheist was a great band that introduced jazz influences to the world of thrash metal (and brought us Tony Choy!), but they sometimes extended themselves a bit too far. For example, the breakdown in "Earth" on their final LP "Elements" in which Kelly Schaefer does an awkward Chuck Schuldiner-meets-Chuck D thing over a very cheap 808 beat. I know they were from South Florida, but they should have left the 808 to the likes of Def Bass Crew.
We've already covered this band extensively, but if we didn't mention Mordred in a post about unfortunate experiments in rap-metal, we just wouldn't be doing our job.
This was Fieldy from Korn's rap side project. It's great! If you didn't get enough of his bass hanging around his ankles in Korn, you will surely get your fill from songs like this one.
This is actually not an unfortunate experiment at all, because Crazytown is one of my favorite bands. At first I just started listening to them for a joke, because I saw the video for "Butterfly" and I was like "This guy is the biggest blowjob on the face of the planet!" and I downloaded their album. But then it grew on me, and now I am totally into Crazytown, 100% non-ironically! I even got Shifty Shellshock's solo album (thoughtfully titled simply "Shifty") on half.com for 74 cents. An interesting piece of trivia is that the drummer for Crazytown previously played in Chuck Mangione's band! If you want more trivia about CxT, head over to Crazytown.info (the largest un-official source of CxT information on the entire interweb) and read up!