Here they are...

Just about timer mark 41 minutes, just after Bert leaves the guys with MRE's (and Earl eats the toilet paper...)

Bert drives the tank about on a berm beside the road in the tall grass, it then cuts to him narrating a video of it, then back to the tank driving toward the camera out of frame, and a puff of dust as its swallowed... and he blows it up, and he notes that 4 lbs of C4 is a ~bit~ too much...