When asked by an interviewer what his taste in Music was, he mentioned a few bands before saying he was a big fan of hip-hop and knows the lyrics to Will Smith's "Miami". He then proceeded to rap the first verse. Its exactly as awesome as it sounds.
Smosh's interview. Anthony and Ian both interviewed him separately, and one was giving the other instructions via earpiece to ask the stupidest questions and do the creepiest/embarrassing things - or get Tom to participate in them - such as doing an embarrassing handshake, getting him to rap, sing "My HeartWill Go On", and mimic his and Natalie Portman's faces on the Thor: The Dark World poster. And he just rolls with it.