If you want the pink gem, right after you escape the waive and the door closes, hit the checkbox. Just before the exit there's the green bonus box and pink platform.
DON'T brake the box before getting on the platform, as this will explode the nitro boxes destroying your remaining 3 boxes for another gem, plus it destroys the path to the PINK gem.
Hope this saves you some trouble.
Also, don't bother getting all the gems at once before getting all the powers, because you won't be able to.
Added by: DevilT , ID#280