[Dire]

Exploitable by anybody who's even remotely capable of picking up on tendencies. Hero's hand is the nut single pair hand - and he said he planned to check/fold the river. Meaning he's giving villain credit for two pair or better after villain's incredibly strong line of calling a cbet and checking behind on the turn. That is called playing weak tight. It's not uncommon, it's easy to pick up on, and very easy to exploit.