Hello dear libertycity.ru users! I was wondering how to surprise you. And he came up with!
Have you played Left 4 Dead 2? If yes, then you know that there are incendiary cartridges that set the victim on fire. Now this feature is in GTA: San Andreas. Select AK-47 or M-16, press the "N" key and fire up! To disable incendiary rounds, simply use the mouse wheel to change weapons and the rounds will become normal.
P.S. I deliberately rummaged through the entire file archive and did not see anything like this. Needless to say, it's already happened... =)