SANTA CLARA, Calif. — Mike Iupati sat through the roughest film sessions of his 49ers career Monday and Tuesday, replaying the devastation from a 29-3 loss to the Seattle Seahawks.
No play looked worse for the 49ers' left guard than a third-quarter snap in which Red Bryant upended the 331-pound Iupati, who landed on his butt 5 yards behind the line of scrimmage. It was a first-of-a-kind sight.
"Exactly, that's why I'm surprised," Iupati said Tuesday. "I'm like, 'Why did that happen?'"
The film room provided answers: "I was too high. I didn't punch. I wasn't on my game."
Neither were his teammates. The 49ers' power run game vanished, as Frank Gore had only 16 yards on nine carries. The pass protection frequently broke down, the receivers rarely broke free, and quarterback Colin Kaepernick passed for 127 yards with three interceptions and a lost fumble.
Two snaps after that play against Bryant — where Kaepernick escaped pressure and found Bruce Miller for a 17-yard completion — Iupati committed a false-start penalty.
"The 12th Man's no joke," Iupati said of Seattle's crowd, which set a Guinness world record for loudest stadium roar.
"And, honestly, I played (crappy)," Iupati continued. "We have a great group of offensive linemen. Offense takes 11 guys doing their job, and if one doesn't. ... It's a lesson learned."
Iupati plans to focus on his fundamentals and technique before the 49ers (1-1) host the Indianapolis Colts (1-1) on Sunday.