Player didn't call the last bet but tabled his boat

[Mr Rick]

Maybe not technically - but in the spirit of the best interest of the game it is.

I have seen this happen - and the dealer asked the player opening his hand whether he was calling or folding. The player then realized he had to push a bet out and did so (in my case without having seen the other hand).

In this case the dealer assumed it was a call. And the Floor backed him up. Worst hand failed to win on a technicality.