Am offline for a while, but had a moment to post, with this question:

Who out here is good at identifying Soviet armored vehicles? I swear to God I was standing next to a ZSU23-4.

Update: Here are two frames.

Looks like mounts for 4 23mm cannon, with case ejection chutes and coolant lines, on the front of the rectangular turret.

Six roadwheels, evenly spaced except for the frontmost, no return rollers. Two reloading hatches on the side of the hull. See again the rectangular turret.

Yup. A ZSU23-4. Compare with photos and (French language) description here.