Developers Didn't Think This Mission Through - GTA San Andreas

In GTA San Andreas' mission "Customs Fast Track" there are some pretty funny glitches and exploits you can perform without modding the game. Why Rockstar decided to make the mission this way is questionable, but a great way to mess around in the game.

Timestamps
0:00 - Make Cesar drive anything
2:40 - Duplicate Cesar
3:00 - Cesar vs. Cesar fight
3:46 - Messing up cutscenes
5:28 - Small glitches and details