Apple iPad on David Letterman

You know you've made it big when the Big Man of late night TV "David Letterman" starts cracking jokes about you.

Last night Dave took it upon himself to show off the iPad and then poke a few puns at it too. But the nice thing was he gave people a bit of a taste of things to come from the iPad with a comical twist.

Letterman's nightly "Top Ten" installment was the top 10 questions to ask yourself before waiting in line for the iPad. The Late Show host then pulled out an actual iPad, and attempted to demonstrate its ability to automatically rotate before he accidentally hit the lock button on the device and turned off its screen.

Letterman then slapped the iPad, banged it against the table, and shook the device in a humorous attempt to turn it back on. Unable to turn it back on, he even jokingly tried licking it, earning laughter and applause from the audience at the Ed Sullivan Theater.

"The radiation this thing gives off is incredible," he joked. "You're supposed to wear a lead apron when you operate it."

Later in the episode, the first guest, Sam Worthington, noted he doesn't know how to use an iPad, and then placed it under his coffee mug as a very expensive coaster.