Players who are experiencing 300+ ping are being hit by zombies, players or having actions performed on them but they do not actually see anything.

Players who are shot/damaged/ acted upon in any way (handcuffed for example) will experience the action after a very long time (4+ minutes). On players without massive ping the player will commit many weird bugs, for example moving rapidly while unconscious on the ground or shooting randomly (and the player WITHOUT ping lag will experience the damage instantly)