Steve-O‘s new opening act on his comedy tour is Bam Margera … and the ‘Jackass’ alums hit the stage together to workshop some new material.

We got video of Steve-O shocking the packed house at the Elsinore Theatre in Salem, Oregon last Sunday — and Bam’s surprise appearance drew huge applause from the crowd.

In the video, Steve-O helps Bam work on some jokes … comparing Bam’s life to Britney Spears‘ and telling a few stories from rehab.

Steve-O told the crowd he’s bringing Bam along for “The Bucket List Tour” because he was terrified Bam was going down a path that would end in an early death. He said he wants his buddy on the road with him to see if it’s possible for him to lead a healthy life and find a happy ending.

Remember … Bam recently revealed on Steve-O’s podcast he was pronounced dead in a hospital back in December, when he had 4 seizures and a nasty blood infection.