"When the energy goes up, your intensity has got to go up, too," said Miller, who made four first-half 3-pointers.
The Bengals led by 19 points halfway through the third quarter, but Viewmont surged back behind center Blake Wilkinson, who finished the game with 27 points, 13 rebounds and five blocks. But Wilkinson's potential game-winner clanged off the back iron with three seconds left in regulation.
Brighton coach Lyndon Johnson later called the Bengals' collapse "gut-wrenching."
In overtime, Viewmont seemed poised to continue its surge, taking a three-point lead after Bengals center Austin Hudson fouled out. The Bengals seemed to be in trouble, playing with a patchwork squad after Hudson and Loi Masina, who scored 21 points, both fouled out.
"We had guys in who aren't usually in that situation," Miller said.
After the Vikings took their first lead, Miller was fouled on a 3-pointer, and scored on the next play as well to reclaim the lead at 61-59.
When Viewmont next got the ball, trailing by two, Wertz recognized something he'd seen on film. Haden Heath popped to the top of the key to take a pass, but Wertz wasn't screened away like usual, so he made a calculated decision.
"I decided to go for it," he said.
The diminutive junior avoided committing a foul as he wrestled the ball away from Heath and cruised in for the layup and his only two points of the game. They couldn't have been worth more to the Bengals.
"He's done that a couple of times this season," Johnson said. "He's so active, he's so tough. He just made a big play."
Other games Monday
West Jordan 61, Granger 43 • Jordan Loveridge made 14 of 18 free throws and scored 11 fourth-quarter points and 22 overall to lead the Jaguars to a comeback victory over Granger.
"You'll usually end up with stretches where he does take over games," West Jordan coach Scott Briggs said.
Lone Peak 58, Pleasant Grove 33 • Lone Peak breezed past its Region 4 rival behind 17 points from Nick Emery and 15 from T.J. Haws. The Knights will play West Jordan in a Wednesday quarterfinal rematch of the 2008 title game.
Fremont 53, Alta 41 • The Silver Wolves' inside duo of Brock Smith and Tate Lewis combined for 26 points and 20 rebounds, as the No. 1 seed from Region 1 knocked off the defending 5A champions.
West 51, Riverton 41 • Tyrell Corbin made five 3-pointers and scored 33 points to lead the Panthers to a comeback win over Riverton. The Silverwolves held a slim lead at halftime, and the game was tied with 4:28 remaining before Corbin scored eight straight points to put the game out of reach.
"I was feeling it," said the senior, who is the son of Utah Jazz coach Tyrone Corbin.
Murray 52, Copper Hills 38 • The Spartans overcame a sluggish start and David Collette scored 22 points to top the upset-minded Grizzlies.
Copper Hills led at halftime, 19-18. Murray coach Jason Workman said the Spartans can't afford any more slow starts.
"With the teams that are left," Workman said, "we can't repeat the first half and hope to have success."
Bingham 79, Skyline 58 • Despite sporting the state's leading scorer, Jaden Jackson, Skyline couldn't keep up with the streaking Miners. The Region 3 champions picked up their 10th straight win, behind 19 points from Logan Parker and 18 from Connor Williams.
Bingham scored a bulk of its points in transition after outrebounding the Eagles 38-29. Skyline hung around until Bingham broke the game open in the third quarter.
"We just started pushing the ball," Williams said, "and we got a lot more layups."
American Fork 66, Davis 46 • The Cavemen gradually put away the defending 5A runners-up to force an exciting Wednesday quarterfinal game with Bingham. American Fork opened up a halftime lead of 27-18 and it just kept growing. Quincy Bair led the Cavemen with 15 points.
"It feels good to get this first win," said point guard Marcel Davis, who finished with 10 points.
Tuesday, 4A boys
At Dee Events Center,Weber State University
• Ogden vs. Olympus,9:30 a.m.
• Snow Canyon vs. Woods Cross, 11:10 a.m.
• Timpview vs. Bountiful, 12:50 p.m.
• Springville vs. Box Elder, 2:30 p.m.
• Payson vs. Timpanogos, 4:10 p.m.
• Highland vs. Mountain Crest, 5:50 p.m.
• Sky View vs. Salem Hills, 7:30 p.m.
• Lehi vs. Dixie, 9:10 p.m.
Wednesday, 5A boys
• Bingham vs. American Fork, 11 a.m.
• Brighton vs. Murray, 12:45 p.m.
• Fremont vs. West, 2:30 p.m.
• West Jordan vs. Lone Peak, 4:15 p.m.