B/c RAmpage talked mad shit about Wandy, and always called him ugly, talked about how he's gonna knock him out, etc. Then, after Rampage beat someone(forget who) he called out Wandy saying to give him "his belt" which resulted in Wandy coming in and saying "MAH BELT" and pushing him all crazy-roidrage-like.
It was after he beat Kevin Randleman.
It's just a general lack of respect, as people have said like calling him ugly. Disrespecting him after his 1st win....talking on a cell phone during the Brazilian national anthem.....i thought that was just awful