The former 'Jackass' star appeared in a new segment from a group of young pranksters called the MadHouse Boys -- who posted the full video on their YouTube page capturing the moment they had BM confront a giant python face-to-face.

Check it out ... Bam's blindfolded from the jump, and as soon as they remove it -- he sees what's in front of him and makes a run for it. After some cajoling though, he comes back.

As you see, he eventually brings himself to pose with the python -- thanks to his fiancée Dannii Marie, who stuck it out with him and helped him overcome his crippling anxiety.

Later in the video, the MadHouse guys give him a much smaller snake to hold on his own -- and he conquers that, too ... albeit, with a lot of wincing and squirming around. Still though!

Bam's fear of snakes is well-documented -- he did a bunch of stunts with Johnny Knoxville and co. back in the day that put him right in the midst of these slithering beasts -- and he freaked the hell out each and every time. Good content then, and great content now.