Besides the three secret levels found in the sixth warp room, there's two more hidden inside levels of the third warp room. It works similar to what seen in Crash 2, only that instead of unlocking a portal to the hidden level, we are taken directly to it. The level we cover in this video can be found by entering Road Crash and hitting the alien sign. Doing that takes us to the final jet-ski level. Unlike the other levels of its kind, this one doesn't have a set route. Instead, the level is wide open with the boxes scattered around it. Also unlike Ski Crazed, this level has a enemy present on it, being the white sharks. Since the boxes are scattered, is pretty easy to leave some behind. So I used the best order to not lose any crate. To exit the level with the gem, you must hit the green switch crate to detonate the nitro blocking the way to the portal. We'll be back to this level later, in order to get the relic here along the remaining ones.