The only truely odd thing I've had happen to me was have a Panzer take multiple tiger rounds to the side and rear at less than 10m, and then multiple Panther rounds to the front, turret, sides, and rear.
Only got the kill when he towered out after we killed M3 at troops his base. I have no doubt that if he had gotten supplys, both the panther and I would have been one-shotted.
I've seen rounds that look to be passing through tanks, but upon close inspection of the film, I saw that I was shooting too low and having my rounds pass under him (the only time I've expierenced this is when my target is slightly higer than me, which supports my theory that I've never had a round pass through someone without getting a hitsprite)
However I have been on the other end of this. A Tiger I came up to me and started pumping shells into my T-34/76. After at least 5 rounds, he started circling around to put one on my engine decking (I was tracked, and this was back when tracking caused your vehicle to tip toward the damaged track) and I one-shotted him as he pulled across my line of fire with an HVAP round. So I do admit strange things do happen, but I don't think it happens often enough that people can develop a pattern as to which vehicles are particularly aflicted.