Crazy Band Ideas

Extremely High Pitched metal, with ear piercing shrieks for vocals, tenor guitars or electric mandolins or something, and double hi-hat for drums.
 
Death Metal Rap. Not with Death Metal vocals. But at a Rap pace with Heavy Guitar. Its probably been done, but I've never heard any.
 
Power/Doom Metal. Thats gotta be like the biggest oxymoron possible ^^
Or Brutal DM played using Ukelele's. Now that would be some weird shit.