When the Steelers meet the Vikings in London on Sunday in a matchup of 0-3 teams, most people will be watching to see if Ben Roethlisberger can finally put together a good game, or how Matt Cassel plays in his first start in 10 months.
Here's something else to keep an eye on: How Steelers cornerback William Gay responds if he happens to find himself one-on-one in the open field with Vikings running back Adrian Peterson. It's the worst-case scenario for any defensive back, especially one giving up nearly 30 pounds to the league's most bruising runner.
We mention this because four years ago, Gay found himself one-on-one in the open field with Peterson bearing down on him. The cornerback hesitated, got steamrolled, and once he was pried off the turf, left the game with a concussion.
During training camp, we asked Gay about the play, and what was going through his mind as Purple Jesus was sizing him up.
"Yeah, I remember that," Gay told CBSSports.com in late July. "It was one of those plays where, man, I got caught thinking, 'What should I do?' I'm not a dirty player so I didn't want to go after his knees, and I got caught between 'Should I go for his knees or hit him up top?' Next thing you know, he saw me, ducked his head, and ran me over.
"I know next time I ain't thinking," he said. "I ain't thinking at all. I'm just going to pray I don't hurt him and go low."
And Gay could get that chance on Sunday.
Image via Vikings.com