Daryll Clark said there's about a seven-minute stretch of time he doesn't remember from his last game in a Penn State uniform.

Wednesday, Clark spoke with reporters for the first time since suffering a concussion during the Nittany Lions' come-from-behind win at Ohio State and offered a glimpse inside his helmet from that Saturday night.

Clark said he remembered getting hit in the head, and then receiving a knee to the back of the helmet, something he called a, "boom, boom hit."

After that, his memory went black.

"I looked up at the clock and it said 13. The next time I looked up it said six minutes, in a matter of seconds," Clark said. "I don't remember anything between that.

"I remember getting hit and I played maybe six or seven plays after that and I blacked out. I don't remember anything that happened until I came to and I was on the sidelines."

Those seven minutes might have been the most important minutes of the season for the Lions. As Clark stood on the sideline watching, as he said, "Not my true self," as the Nittany Lions forced a fumble and scored a go-ahead touchdown.

Clark said when he "came to," Penn State was up, but he wasn't sure how it had happened.

All he knew is that he got hit hard.

Clark said he receives shots to the head during most games, and most times, he said he just takes a few seconds and he's fine.

But he said he had never taken a blow quite as hard as the one delivered by a pair of Buckeye defenders, including linebacker James Laurinatis' knee.

"My chinstrap was up in my nose because my helmet had gotten rearranged on the hit," Clark said. "Usually when you get a hit like that, you get a ringing in your head but you're able to shake it off the next play. But I kind of knew that this might have been a concussion because that ringing did not disappear until maybe the next day."

Of course, Clark didn't know the severity of the injury at the time. After staying on the field to finish the drive, team doctors took him out of the game.

Television cameras showed Clark, visibly upset, on the sideline. But Clark said he doesn't remember fuming and had to be told by others that he had been mad.

"I was pretty messed up, but I didn't wanna come out," Clark said. "So I just tried to continue to play and shake the cobwebs out.

"I guess I hid it pretty much on the field. The doctors couldn't see my eyes while I was on the field. When it was time for us to punt and I went off to the side and then they saw them."

Clark, who also suffered a concussion against Michigan in 2006, said he had to take the post-concussion "imPACT" test twice, but passed it and has been cleared to play this weekend.

He said he's taken all of the reps with the first-team offense, although he's worn a jersey emblazoned with a green cross warning defenders not to hit him.

Clark said he feels fine and is ready to get back on the field and get hit. But he said he'll never forget losing those seven minutes against Ohio State.

"It was a scary thought. It was really weird," Clark said. "I've never had something like that happen to me before, to black out and lose a couple of minutes of your life and don't even remember what happened.

"But I'm very anxious to go out, get that first hit and get the jitters out. See how I am. The guys have been protecting me well this week so I don't get hit, but obviously I'm going to get hit in a game. That'll let me know who I am."