corner glitch:

Go up to a corner, and make your body perpendicular. You need to hold L and move right into the wall. If you try and don't move, that means your doing good. If you move up or down while doing this, it means your body isn't in the right spot. Alright, so if you are Holding L and trying to move in wall, but you stay in the same spot, then, turn body without L carefully into the corner.

Surge Glitch: Alright, this is bit trickier. Basically, I believe the only spot is at seal base and that certain corner. You do the same corner glitch I just tried explaining, and once your head is in the corner, keep moving forward while holding L, and move to the left and right. There is a certain spot in the corner that'll glitch you up. Sometimes, you'll glitch up, but you won't get over the fence.

So sorry if my little explanation didn't help. I'd check youtube. You can read what this says while watching xD

Anywayz, ReP + me if I helped!