The "Jackass" boys are back, and apparently have a little feeling left in their extremities. This time, "Jackass 3D" goes where the boys have never gone before -- and I'm not even talking about the whole 3D thing.

This entry into the "Jackass" franchise exposes every cast member's deepest fear, as well as many of their body parts. Yes, this film has more man junk for your money. Usually, I am completely in favor of that, but here, it's just downright uncomfortable.

Maybe that's because you have to wonder how everyone made it out alive here, with junk completely intact. The stunts are rapid fire, and have names like Beehive Tetherball, the Lamborghini Tooth Pull, Buffalo Rollerskating, The Blind Side, Apple of My Ass, and The Ram Jam.

Despite a bit of aging, the gang seems to wince a little more about the impending pain. However, they still thrive on it, and so does the audience. What makes watching a bunch of dudes run through multiple dangling stun guns so damn funny? Moments like these are downright painful to watch, but also extremely entertaining. Of course, there are other stunts that are way more dangerous to the gag reflexes. The Sweatsuit Cocktail and Poo Cocktail Extreme are especially gag-worthy moments.

One would think that the 3D would increase the "ew" factor, but frankly, it doesn't seem to matter. The 3D effects are extremely uneven. In fact, most of the movie looks like it was filmed using the same crappy techniques from the early MTV days. Then, every so often, a golf ball, dildo, or other projectile will come flying out just before it cracks someone in the face and/or nuts.

The opening and closing sequences showcase the best 3D effects, but those moments have staged shenanigans. Otherwise, there is a bit of depth to the movie, which delivers the "you are there" feeling. It's nice to feel like one of the crowd, assuming you want someone to sneak up and urinate on you or throw water in your face right before you get clocked (that's one of the least effective running jokes, titled "The Rocky").

The end ties these aging men to their boyhood, showing old clips and photos as Weezer's "Memories" blasts in the background. Ah yes, it was a simpler time, when star Johnny Knoxville's kneecaps and/or balls were both in good working order. Don't get too choked up, though. It's hard to imagine this will be the swan song, given this weekend's $50 million haul.?

Overall, "Jackass 3D" is disappointing when it comes to the 3D part. It will make you laugh like a cracked-out hyena, but this film is far from "Avatar." Instead, it flounders on the technology side, relying on our love of punches to the head, gut or groin to get by. Of course, that's enough. If you buy a ticket to "Jackass 3D," Jackass you shall get.