I've experienced:
-Basketball glitch, where saving at Madd Dogg's mansion eliminates all the basketballs from the game *crying purple thing*
-Having a parachute in my inventory when I commandeer a plane, and then jumping out and pulling the cord results in "parachute failure" where CJ does his parachute fall animation while still dropping like a rock
-Losing almost all my health while doing the above and dropping into water (falling into water normally negates damage)
-Beagle at Fort Carson-it's unflayable because the game spawns the wings inside of a porch
-Being wasted "twice" (usually the result of the game sending you to Montogomery or Fort Carson to respawn, but loading the data wrong)
-ped car hostages not dying when killed by you
-Johnson house garage eating my *&*&*34#* cars
-Not a glitch, but put your disc in your computer's CD tray and check its files for a file called "american.gfk" or something like that (in the text folder.) The file shows evidence that there was going to be a skateboard in the game, which would probably make the two goofy halfpipe missions make more sense (perhaps they couldn't work a skateboarding CJ into the plot so we got the Black Project and parachuting as a compromise?)
-(V thank you for reminding me) in one of the pictures in my photo gallery, taken at the beginning of the game, I have a pic of a dead guy standing on his head, limbs spread out, the result of him being hit by a car or something and then the car vanishing by the time I got the camera ready
-Basketball glitch, where saving at Madd Dogg's mansion eliminates all the basketballs from the game *crying purple thing*
-Having a parachute in my inventory when I commandeer a plane, and then jumping out and pulling the cord results in "parachute failure" where CJ does his parachute fall animation while still dropping like a rock
-Losing almost all my health while doing the above and dropping into water (falling into water normally negates damage)
-Beagle at Fort Carson-it's unflayable because the game spawns the wings inside of a porch
-Being wasted "twice" (usually the result of the game sending you to Montogomery or Fort Carson to respawn, but loading the data wrong)
-ped car hostages not dying when killed by you
-Johnson house garage eating my *&*&*34#* cars
-Not a glitch, but put your disc in your computer's CD tray and check its files for a file called "american.gfk" or something like that (in the text folder.) The file shows evidence that there was going to be a skateboard in the game, which would probably make the two goofy halfpipe missions make more sense (perhaps they couldn't work a skateboarding CJ into the plot so we got the Black Project and parachuting as a compromise?)
-(V thank you for reminding me) in one of the pictures in my photo gallery, taken at the beginning of the game, I have a pic of a dead guy standing on his head, limbs spread out, the result of him being hit by a car or something and then the car vanishing by the time I got the camera ready