And I know we dont always get paid for it... but most of us have used other peoples jokes, lines, presentation, even ones look.
Like blood said, as long as you make it your own... and not just copy it exactly as the original person you heard it from or saw perform it.
His actual stand up is way more original and his own, than his tv series.
How many people that own BTP, I wonder perform the effects taught exactly the same way Oz performed them? Granted one might have paid for the dvd (routine and presentation) its still unoriginal to use it as taught.
Or the people that copy angel or blaine or johnathan...
Not to say I dont like other comdians. I love Robin Williams, Bill cosby, blue comedy tour, Richard Pryor, Jeff Donhum, and many more.