Tony Romo is used to performing on the big stage, starting 127 NFL games for the Dallas Cowboys, but as he gears up for his first Super Bowl as an announcer, the CBS Sports broadcaster expects some butterflies.

"I'm anxious to see the feelings going into it because I've never broadcasted one, but I know how I felt going into the AFC Championship — that was such a big deal," Romo said Wednesday on a CBS Sports conference call. "It'll be ramped up even more than that."

Romo's uncanny ability to predict play calls has been lauded throughout his two years in the booth, but an enormous audience was introduced to it during the Patriots' overtime win against the Chiefs on Sunday.

Broadcaster partner Jim Nantz chalks that up to just how detail-oriented a quarterback Romo was in his playing days.

"My partner had to have been — in his Cowboy days — some sort of sick film room guru — who took the time that was needed to completely solve the puzzle," Nantz said.

"He and Tom Brady are seeing the same thing. People think Tony is a fortune teller, but this isn't guess work and it isn't guess work and it isn't psychic ability."

"When we have these key moments late in the game and we're all dazzled by what he's doing, it's a testament to his years of work and preparation," Nantz said. "He's not guessing and he's not getting some sort of message from the gods. He's seeing what Brady saw."

Romo said he doesn't go into games planning exactly what he's going to focus on.

“I try not to pre-determine too much stuff because the game is a story and you’ve just got to call it," Romo said.

The 38-year-old has been known for some level of histrionics in his broadcasting career, frequently reacting with extreme enthusiasm as the game unfolds in front of him.

But can you blame him?

Said Romo: "Sometimes you get passionate and excited in the moment and you start talking out loud — what's going through your brain."

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