Fallon, Freeman get helium help for "Tonight Show" interview

Jimmy Fallon and Morgan Freeman inhale helium during Thursday's interview.

Not even the legendary voice of Morgan Freeman is safe from Jimmy Fallon's antics.

Thursday night, the "Tonight Show" host closed his interview with the Oscar-winning actor by pulling out two helium-filled balloons. They took turns inhaling the helium, conducting the end of the interview with a squeak in their voice.

"I really shouldn't be doing this," a high-pitched Freeman said. "It's very undignified."

Watch the clip