sandmans story

I went to a Comicon in Toronto sometime many years ago and a person came up to me and said "say these words" I don't remember what the words are now cause this was awhile back but I ended up turning my hands into rocks and they even gave me a "sandman" t-shirt which was green and striped.... and between you and me I was in the third spiderman movie... and in one of the newer spidey movies... with the black electric dude can someone help me ?