If I'm on Zarya or D.Va and manage to get caught in a charge, I won't die from the pin (D.Va gets ejected), but there's a 99.999% chance I'll die anyways unless someone manages to kill Reinhardt in the next 2 seconds. His hammer swing feels like it's three times the length of his body sometimes, there's pretty much no way for a character with no increased movement speed to get away from that range once you're in it. Plus, Reinhardts seem to hate Zarya so much they will quite often use their Q on her alone after pinning her just to make sure.