I'm not saying SU's so don't get all excited, but there was one area off in the -1 area where I saw an unopened chest just "floating" I went to it and it ended up being on a platform connected to the main area...no big deal, but the thing is that when I went to it it had those "invisible walls" on BOTH sides of it, either it was a glitch or there are some things you cannot access without that H-5 walkoff. BTW the chest only had 250 onyx coins. Still though it was odd.