SUNBURY-ON-THAMES, England -- There's horsepower.

Then there's Adrian Peterson power.

They may not be all that different.

After Sunday's win against Tampa Bay, Cardinals quarterback Carson Palmer said he could hear Peterson's feet as he began running behind him.

"He's putting so much force into the ground with every step," Palmer said. "With a cut, when he's going to sprint, he's just different.

"He's very unique. He's one of one. He runs so differently and so angry, I guess would be describing it. He runs with so much violence, every run, inside zone, outside zone."

While Palmer may be the closest player to Peterson on every play, the Cardinals' offensive line knew exactly what Palmer was talking about when it came to Peterson, who ran for 134 yards and two touchdowns on 26 carries.

"I can feel him, too," right guard Earl Watford said.

"I don't know how much more force you can put into the ground and create as much explosion as he does," left tackle D.J. Humphries said. "That dude is something special."

Peterson has a "look in his eyes," longtime friend and teammate Larry Fitzgerald said, when he gets into the huddle, which brings added energy.

But Peterson isn't just all power. He has some quickness, too.

Humphries, who helped spring Peterson for his 27-yard touchdown run in the first quarter on Sunday, said he heard Peterson whiz by him.

He's unlike anybody Humphries has seen.

"If you break down the play you could see me blocking, blocking, blocking, then like as soon as he runs by me, I do like that [turns head quickly] because I felt like somebody was about to run into me or something," Humphries said. "He was shot out of a cannon."