Lol Kansas City is far from the first city to do this, Philadelphia Cheers players getting injured on a regular basis going back to 1990 when they cheered Michael Irvin being carted off on a stretcher. They cheered when he was initially hurt, and again when the medical team brought out the stretcher. Browns fans cheered when Derek Anderson got hurt back in 2008. To go outside Football, Phillies fans cheered when Jayson Werth was injuried (this is baseball for those who don't know). Is it horrible and unforgivable? Yes. Does it make the Chiefs fan base the worst in sports? Not even close. That title will forever belong to Philadelphia sports fans, who not only cheer injuries but also threw snowballs at opposing fans, booed AND threw snowballs Santa Claus, threw batteries at their only black baseball players back in the 60s, and again at Cardinals outfielder JD Drew in 1999, threw glass bottles on to the field in protest of an umpires call back in the 1940's, attacked a St Louis Blues fan AND the teams head coach in the 70s, and in April of 2010 vomited on an opposing teams fan, who was an 11 year old girl. Their fan base is actually so bad that in 1998 the Eagles installed a Judge, court, and jail INSIDE THEIR OWN STADIUM to deal with unruly Eagles fans. Let that sink in. The teams fans were so bad they built a jail in the stadium.