Alex Ferguson called the decision not to award a penalty for this challenge the worst he's ever seen

Alex Ferguson called the decision not to award a penalty for this challenge the worst he's ever seen

...won 45-10. Oct 4, 2009; Cleveland, OH, USA; Cleveland Browns head coach Eric Mangini throws his challenge flag during the first quarter against Cincinnati Bengals at Cleveland Browns Stadium

...Nov.11, 2001. Tiger Woods, paying his first visit to China, participated in an exhibition match facing challenges from top Asian professionals

...Nov. 11, 2001. Tiger Woods, paying his first visit to China, participated in an exhibition match facing challenges from top Asian professionals. (AP Photo/Vincent Yu

August 7, 2009: Nike Global Challenge at Liberty High School in Hillsboro Oregon. Myck Kabongo of Canada drives up the floor against FMP...

...end -- or at least level off. But it only seems to be growing season after season. The challenge for resorts is to keep up with the expectations of a generation of jibbers. At some point...

Theo Walcott lies injured after Liam Ridgewell's challenge

Toulon's red line

TOULON, FRANCE - OCTOBER 15: Jonny Wilkinson (r) of Toulon during the Toulon v Saracens Amlin Challenge Cup Pool three match at the Stade Felix Mayol on October 15, 2009 in Toulon, France

...G. Newman Lowrance/Getty Images) LOS ANGELES, CA - JULY 27: Tournament honoree Pete Sampras celebrates winning a challenge while taking on Marat Safin in the Millennium Challenge during the LA Tennis Open Day 1 at...

Fame Will Travel

...travels great lengths to compete. The better she gets, the further she has to go for a challenge

Lee Wallace of Scotland looks dejected during the Kirin Challenge Cup in Japan

L.J. Jenkins waits for a decision after J.B. Mauney challenges the clock on his ride during the short go of the Copenhagen invitational in Reno, Nev

...29, 2000 at Gaints Stadium in East Rutherford, N.J. Fassel was 0 for 7 in coaches challenges this season until winning one on Sunday. The Giants beat the Eagles 24-7. (AP Photo/John...

...Vivian Stringer, right, after being named tournament most valuable player, Sunday, Dec. 4, 2005, at the Hawkeye Challenge in Iowa City, Iowa. Pondexter scored 22 points as Rutgers beat Iowa, 57-51