The first glitch, on crash is not possible anymore, its patched. Now for the second glitch, its not really a glitch. If they made it so you can get up on the dumpster, then make it so you can get on the wall, both with the "Press (A)" option, they want you to do it. Now, if you had to jump on someone, or get over an "invisible wall" then it would be a glitch. I think they intended on that happening when they made the game, no glitch is that easy.
Got milk?