The King of Queens - Season 8 Episode 19 -

It's Doug's 40th birthday and when Carrie's co-worker begins to question Carrie on whether Doug is freaking out or not about getting older and not accomplishing a whole lot, Carrie then begins to try to make Doug realize that he should start wanting to do more with his life. So Doug decides he wants to ride a roller coaster that he was to afraid to ride when he was younger.