Angel is definitely an excellent entertainer and I believe he has a much darker side as MH proposes. I know that he is close friends with Gene Simmons of KISS and kiss supposedly stands for Knights in Satan’s Service, but this is pure speculation based on tidbits of info that I have read. I certainly wouldn't put it past them though.
It’s kind of like the first card trick that you were ever taught. So amazing, but amazingly obvious. Angel definitely has a powerful mind, but I am sure most can be explained.