Sword swallowing- This will work with anyone with a long staight sword the stick it down there throat as far as they can and as quick as they can the turn it. So it cuts there throat and that swords big enough it rips open ur neck.Hari Kari!!!

eye stabbing- this may work for kira, takes both knives and jams them into her eyes

BO roi cho's- eats a bucket of lard and butter, then gets a heart attack and dies

self impale- self explainatory

liu kang- since he is a spirit, he send him self to hell

Light yourself on fire. Many Monks would do this out of protest, it seems very fitting for Mortal Kombat. Your opponent is about to go in for the kill, all the sudden, you cross your arms and hold them against your chest, hands open. Two fireballs appear in the palm of your hands and quickly engulf your body.

Characters with a blade weapon should cut off their own limbs. One fighter could slice off both legs. Another could cut off one arm. And another could sever his or her own head.

(This ones my favorite) Baraka should put his fists against his chest and then shoot out his blades, much like Wolverine does in the original X-Men movie.

Jax or Sonya could pull out a gun and shoot themselves in the head.

Sub-Zero should freeze himself from the waist down, fall backwards and shatter... leaving just his bloody upper torso.

Bo Rai Cho should drink heavily, causing him to vomit uncontrollably, ending with Cho on all fours puking up blood.

Shang Tsung could bring back the bed of nails and throw himself on it.

Raiden could electrocute himself into a pile of dust.

Nightwolf could scalp himself.

Reptile goes crazy and just begins slashing and clawing at himself until he finally peels the flesh off his skull and collapses.

Quan Chi raises demons to take him back to the Netherealm.

Mileena could run her Sais through her eyes.

Scorpion could hang himself with the spear.

Kenshi should do his MKDA fatality to himself.

And finally Kung Lao could throw his hat, and it comes back like a boomerang, slicing Lao in half at the torso.