Just hours after hearing of the death of Chris "Mac Daddy" Kelly of the 90's rap duo Kris Kross, Deftones paid tribute to the late rapper during their concert last night in St. Louis by mashing up their song "Engine No. 9" with the 1992 Kris Kross hit "Jump."  Drummer Abe Cunningham also honored Kelly by wearing his shirt backwards.  Wearing clothes backwards was the signature fashion style of Kris Kross.