Setting aside the issue of the F-bombs and poor behavior, just on the subject of the short all-in, as soon as that happened betting action was complete. The gentleman had no option to "fold" at that point. Both hands should have been tabled and then the remaining board cards ran out...
The second issue is the retrieval. This is entirely TD discretion because you have 2 hands touching or fully in the muck. The dealer was "99% sure" of which the 4 cards were but we had to ask the players to ID their cards, always dicey. There's enough here for a ruling either way, IMO, as to the retrievability of the cards. And if they are put in play, this is about as thin as you can get and still retrieve them (again, just MO).
Thanks Martin for raising a very interesting case!