Not the most intense thing ever, but one of the funnest things I've done while stoned.

I went up to Canada for 2 weeks with some homies cause my friend owns a ranch up there. Imagine this: You have several acres of dirtbike track, and even more acres of untouched forest in your backyard. 3 dirtbikes, 3 quads, a golf cart, and one of those Bobcat dirt mover thingies. Holy hell, getting blazed and racing one of your buddies is pretty intense, then when it got dark (like can't even see your hand in front of your face) we'd smoke some more then play laser tag in the woods. Then we'd go on his yacht (3 bedrooms), then blaze out on the ocean. Having rich friends kicks ass.