Why were criss angel and that other contestant on phenomenon fighting. what caused the fight?

Criss said even before they started doing the show that he would expose anyone who claimed to have supernatural or psychic powers, because they are frauds if they say they do. This guy claimed to be able to talk to spirits, which isn't at all possible, and Criss said that. He had an envelope and told that gu that he would give him one million dollars of his own personal money if he could tell him what was in the envelope. The performer then called Criss an "idealogical bigot" and Criss got out of his chair and told him he "didn't want to hear this b*llsh*t, just what is in the envelope" and the performer was avoiding answering the question, and then threw himself at Criss, which is when the host intervened and cut to a commercial. If you want more information, they interviewed Criss, Uri, and Jim after the fight. The also have a video of the fight on the NBC website.