The Ghost BMX Rider is a proven glitch in Grand Theft Auto: San Andreas.
Description
This glitch includes a pedestrian that can be found riding a BMX. When the player shoots the pedestrian in the head with a high powered weapon, the pedestrian is decapitated and what remains is a black health stump. However, when the pedestrian appears dead on the ground, they have a chance of standing up again, albeit headless and in an undead state. When aimed at by the player in auto-aim mode, the pedestrian appears to have green, or perfect, health. As of now, it is unknown if this glitch happens with pedestrians who are not on a BMX.