I was hunting Myths on Youtube then watch:
BIGFOOT: It's a complete lie, but there is a mod for it.
LEATHERFACE: Mod too, though you can find him at a cabin in North Rock. There is a video on youtube about leatherface (Video of LeatherFace or something), though if you don't be courageus, you will get scared when you see the dead bodies... :wow: THEY SCARE MORE THAN RESIDENT EVIL 4 HOLY CRAP!! :O But there is another video that is not that so scary, that it a guy with a modded Hydra (Yellow hydra xD) goes to a place somewhere at San fierro countryside, and sees lots of blood and a random Vortex... and then goes to north rock cabin and sees more blood and then sees a PED at a window of the cabin... Really scary though

U.F.O.: ... Do i need to say?
Jaws/Shark: It's not quite a mod, but with IMG tool you can put a thing there then he happears below San Fierro Gant Bridge. He dosent kill you. Trough if you get near him, he will actually run away.
Serial Killer: IT REALLY EXISTS, you can find him at Fort Carson, Las Venturas, but the myths said it were found at El Quebrados. I saw a video that he saw him at PS2 version. so its 0% lie. The best part it was on PC, he said "...now i'm gonna kick his ass" xD
And i never saw a video of "snowman"... But it cant be that so scary
(Bigfoot xD it is not scary too but leatherface is fcking scary fo' me (Dont comment, im the youngest player here or the second younger player (i'm 10 so dont comment)))