"He'll probably just recycle the same stuff," his father jokes.

If two previous speakig engagements and numerous Harvard rehearsals aren't enough to prepare Krebs for this morning's address, he could also fall back on his clown training from a workshop he attended the summer after his sophomore year. There he learned how to walk to the center of a stage and make an announcement, thus improving his stage presence over the two-week training course.

But more importantly, he also learned how much he prefers improv to clowning.

"It really was actually kind of frustrating because clowning is more precise than improv. I enjoy through improv and the other members of the group creating an entire world," Krebs says. "I think I've always been a make-believer or a maker-believe."

Krebs has been a member of IGP since his first year at Harvard, and says he takes some of the credit for the group's improvement over the past four years. The troupe has grown, he says, and has more paying gigs than ever before. IGP performed a total of 60 times this academic year.

Even though what the audience sees on stage is improvisation, Krebs says, the troupe takes practice very seriously. They practice four hours a week with extra rehearsals before special events. IGP shows mostly consist of improvisation games the performers play with words and situations contributed by the audience.

"It's improved for the audience if we practice what we're doing," Krebs says, adding that each member of the troupe must be able to call on others' strengths during the performance. "You drill yourself on skills, put yourself in a game situation," he says.