Sounds like hydrolock (video)

[nocturnalVX]

That's not hydrolock.
It happened too late after the VX came out of the water.
Also, if you look at the other video, which was taken from the other side of the river, you can see the rocks that the VX in the first video hit.

Ouch for sure, but not hydrolock.

PK

Yup, the Proton ran right into that boulder. The Russians are fearless, but have SERIOUS A.D.D.... yes I'm talking about you Petos. What's the word for STOP! in Russian? Oh yeah, it's STOP!