Upper base: Movie Berzerker (modified)
Spider legs: Kingdom Blackarachnia
Crab claws: RID scorponok
Lower legs: Movie Straffe

After trying to come up with the crab mode with the RID Shockwave, I discovered how ridiculous the figure looked. After toying the idea, I noticed my movie Berzerker figure. I took the truck parts off and stripped him down to robot mode. I cut the leg ball joints off and used a power drill to drill the holes for new leg ball joint attachments. I glued the spider legs to his back. I drilled two more holes for two more leg ball joints for the crab claws attachment. I used krylon red, blue and black spray paint and detailed the figure with paint markers. With the end result.....I give you RAMPAGE...he does transform to a weird spiked crab.