The ghost passenger who refuses to leave your bike — even after dying.

In GTA Liberty City Stories, you can create a 'Ghost Bike Passenger' by riding a motorcycle with a passenger through water to kill them. The passenger disappears but leaves behind blood trails from the front wheel, bone-cracking sounds while driving, and may reappear from certain camera angles. Paramedics can even revive this invisible corpse if they show up.

Source: Glitches in GTA Liberty City Stories — CC BY-SA