Stun

If a units' stun rating passes it's current health, it falls unconcious, unable to see or move. All items held fall to the ground, and have to be manually recollected. It temporarily loses all it's TUs and Energy until it wakes up again.

While on the ground, a body is immune to projectile weapons, but HIGHLY vulnerable to explosives (much like any other item). Most units can be carried to a safer location for medical attention, or a more secure one to stop them wandering away.

Stun goes up when a unit is hit with a stun bomb/rod, or it stands in smoke. Some units (due to their nature or armor) are better protected from stun weapons, and even immune to smoke.

Large units do not wake up if stunned. Cyberdiscs are VERY suspectable to stun bombs, and do not explode if hit by them.

(Unconcious Cyberdiscs count as 'dead' at the end of the mission, but are certainly 'live' during the game. Glitch? The only way to research a live one is to interogate alien medics...)

(What do stun rods do to Cyberdiscs? Doubt anyone would even try it in practise.)

Stun decreases at a rate I never bothered to research. (Does it vary between units?)

(Assume X-Com tanks and Sectopods are immune to stun?)