"Meditech Depot - you are healed!"
"Armour Repair station"
"The smell of a massacre..."
The risk is the gamble, levers are random, pray to RNG before you pull one, hope for medical supplies...or everything around you dying horribly with a single swift key stroke...oh yes it's fun.
Or you could just flood the whole level with lava for fun...just saying. :P
(On a serious note, most of the MOST dangerous levers announce themselves through level feelings, just remember (like I don't) to read the level feelings and you should be fine for the most part.)