Tricky decision! "I put you all-in"

[MrDannimal]

If I'm the dealer, this is easy:

(To seat 8): "Sir, you're acting out of turn. The player whose action it is hasn't announced a bet amount yet."

(To seat 4): "Sir, you can't put someone else all in. All you can do is bet a dollar amount, it's up to other players to call."

Seat 4 can then announce his bet amount, Seat 8 can call/raise/fold/whatever.

Seat 8 gets what he deserves for trying to angle shoot (which he's pretty clearly doing).