Before Riggle can even speak, Grylls says, “Ew… Riggle then asks, “what does it taste like to you?”

To which Grylls responds, “…truly terrible.”

I say it was awesome.

Rob Riggle on Running Wild

Rob Riggle.National Geographic

Rocky Mountain oysters… we had testicles, and they were soaked in pickle juice, and they were… Riggle then stares at the camera, shaking his head no.

Riggle is the latest celebrity to be thrust out of their comfort zone by Grylls.

you’ve got the option to watch the full clip above.

The two-hour season finale ofRunning Wild with Bear Gryllsairs tonight on National Geographic at 9 p.m.