Scherising
When you're playing a video game (especially FPS) and your health is almost depleted or you're even at one bar left before you die, and suddenly you accidentally stumble onto a full health pack, bringing you back from the brink of death to fight once more. Gets its name from the character Scheris Adjani from the anime series s-CRY-ed, whose special ability is being able to bring someone who is mortally injured back to life, though at the cost of her own.
Guy playing Halo: Whoa! I've just been Scherised by that full health pack! I thought those damn Flood would kill me for sure! It's time to kick ass and take names, now that I've recovered! Thank goodness for accidental Scherising!