Just found a pretty nasty wall unholdable setup.
The setup is:
Any hard wall splat (e.g. K or PK) -> 6PPP (W!) -> P+K (Whiff) -> 6K
The 6K is unholdable if they tech. If they block, you get P+K for free. If they don't block, they get slammed into the wall yet again. It's a win-win situation.