I've looked at it pretty closely and believe it's legit, the bullet hitting the ground first dissipated a lot of energy before it hit him.
At a machine gun shoot a few years ago I watched a 50 BMG tracer come back towards the firing line, you could clearly see it, luckily it didn't hit anything and landed
between two cars parked behind the firing line. There were some junk cars on the range, they said it must have bounced off a brake drum, but I'm guessing that a bullet must have hit the dirt first, since a direct hit on a brake drum it would go right through it.
A comment on tires, a long time ago I took one of my 22 pistols out to a dump to shoot, I was shooting at a tire laying in the dump, just a tire, not on a wheel, I fired about 10 shots at it then went down to look at it, you could see where the bullets had hit it and bounced off,
I didn't shoot at that tire anymore!
I believe that since it wasn't mounted, it had enough give to bounce them back.