Dennis Hopper's teenage son is furious with Oscars host Jon Stewart, after he mocked the actor's drugs past during this year's (08) ceremony. During his monologue, Stewart joked the Easy Rider star "didn't know" where he was - citing Hopper's years of addiction for his alleged memory loss. But Hopper's guest at the bash, his 17-year-old son Henry, hated watching his father being teased. The veteran actor says, "I think Jon's terrific. I think it's better to be noticed than not. My 17-year-old son was upset by it. He said, 'Don't they know you?' He's never experienced that with me since I've been sober for 24 years. It's not exactly a new joke."