trot, Sims is an energy dumping capsule that rarely penetrates skin, but it can cause rupture on exposed skin. The 37mm rubber batons are around 200 fps, but even rubber buckshot is much beyond 260 fps. The threshold to break skin with a metal object is under 260 fps and the bone breaking threshold is just over 260 fps. However, a coin would lose velocity so fast that only direct contact would likely cause any real damage, and then the whole canister would relieve the pressure, so maybe a 2nd degree burn would be all.

The guy is an alarmist trying to get cheap attention, and I guess it worked for him.