This list isn't exactly the same as on the forums, just so you know.
1) Alcohol Poisoning;
Some Alcohols are poisonous so if you drink them you will die.
2) Anti-cheat pwnage;
If you get this, you've been a bad boy.
3) Bad drugs;
Some times the bad drugs will lower your health.
4) Bitten by a crab;
Whilst fishing you can be bitten by a crab, chances of killing you if you have very low health.
5) Toxic gases;
If you are near any player who just used /gas or /fart and he exploded, you might die too, depending on your health and armor.
6) Burnt to death;
Run into some flames and find yourself in hell.
7) Caffeine addition;
Coffee is good for drunkenness, but can be lethal.
8) Chainsawed to death;
Somebody chopped you into pieces.
9) Clubbed to death;
Want to play golf? Let's use your head as a ball.
10) Drive into gas station;
Rammed Into a Gas Station
Not enough oxygen, deceased.
12) Drug overdose;
Taking great amount of drugs is bad.
13) Eaten by Bigfoot;
BigFoot liked you and tasted you.
14) Eaten by Jaws;
Jaws are moving animals that can be found around San Andreas, in the sea. Try not to get close to any of them.
15) Eaten by Nessie;
Whilst Fishing if you have no fishes you will die.
16) Falling to death;
Falling from a high building and you realize you forgot the parachute at home.
17) Fishslapped to death;
Someone slapped you with a fish.
18) Hand of God;
Killed by the almighty God.
19) Heli-kill mincemeat;
Helicopter blades + You
20) Hit by car (or parked on);
If you got low hp and get hit by car.
21) Incinerated in burning vehicle;
Staying In a Burning Car
22) Insulted to death;
Very low chances of dying by /foff
23) Killed by a deer;
Whilst you are hunting some deers can kill you
24) Probed to death by aliens;
25) Puking yourself to death;
/puke on low health.
26) Punched to death;
Engage yourself in a man vs man fight and lose. No weapons allowed.
27) Raped by mermaids;
Whilst fishing, if you got low hp you can get raped to death by mermaids.
28) Raped to death;
Getting raped to death by any civilian, especially in jail.
29) Seeing terrible shit;
You got flashed, with good chances of getting killed.
30) Shot by a shopkeeper;
Running into a store and trying to rob it, low chances of getting shot.
31) Shot for being on Police Property;
Go in the police area and stand still.
32) Soup addiction;
Getting killed in the Soup Factory..
33) STD (rape, fishslap or purchased by yourself);
Getting killed by diseases.
34) Stung by Jellyfish;
Whilst Fishing, you can catch a jellyfish, and it will be hostile.
35) Spontaneous combustion;
/gas , Very nice chancing of dying
36) Tickled to death by a ghost;
The friendly ghost in CnR is not so friendly!
37) Torn to pieces by nearby exploding vehicle;
If you got low hp and see a car on fire, stand next to it for a pass to Heaven.
38) Urine Intoxication;
Someone pee'd on you while you were on 5 health points. Is that your fetish?
39) UPS Delivery Bomb;
Sometimes UPS may contain a bomb and, if its accepted, Rest In Peace.
40) Wanking yourself to death;
You bloody wanker, stop touching yourself!
41) Eating too much;
Hey that whole cow was blasting!
42) Clucked to death by the chicken;
43) Death on a fire (while doing Fireman job);
Fireman Job, chances of dying
44) Commit Suicide;
45) Killed by a Hippie;
Planting can be a risky job too!
46) Poisoned donut;
/donut , very small chance the donut is poisonous
47) Instafix explosion;
/ifix , the car might explode