I never saw an uncontested onside kick before. Shouldnt the front row always be looking fo rit? Ive seen surprised onside kciks before but there is always someone form both teams fighting for it.
I think the closest cardinals players was five yards away.
The only one I can think of that comes close was Rams-Jets in 2001. The Jets were getting great kickoff returns, Mike Martz yelled at special teams coach Bobby April about it, and April said they were getting the good returns because the Jets were already running downfield before the ball was actually kicked. Martz asked what they could do to combat it, April said a surprise onside kick, and that's what they did. Worked beautifully.
The Cardinals were doing the exact same thing. They all had their backs turned when the kicker's foot hit the ball.