Never EVER look into the loading nozzle when unloading an AEG!!!
Disclaimer: Yes I was stupid, and suffered from it. No, no permanent damage occured, left a nice brown blister on my eyelid, swelling has gone down. I will ream your ass if you shit on me for this, it's a warning, not to let people have their way with me.
Ok, Put a new hop up unit into an M16, started shooting on semi, no prob. Went to full, started plugging the barrel for some reason. Pulled out the mag, dumped the excess BBs into my hand and back into the containter, saw one BBs in the chamber waiting to get pushed ahead, chambered and fired. Pulled the trigger while the gun was upside down, the BB shot right out of the loadig tube and into my right eye, about 1/4" from the inside corner. I blinked just before it hit, smacked my eyelid and I saw stars, tears came etc. I could still see out of with right after, amid the tears, but within 10mins, I had a 1" long by 3/16" (no, didn't measure with calipers you bums!) brown slug that had formed on the edge of my eyelid. Been almost two hours now, the swelling has gone done, everything is fine.
Just posting this, even if embarrassing, to either wear eye protection when checking anything related to ammo feeding and mechbox action, or to make sure your magwell is pointed in a safe direction when unloading the last BB from your AEG. Often times guns are declared as on safe and mags removed, eye protection comes off, and people will point their barrels in safe directions, gun upside down, to make perfectly safe the AEG. Be VERY careful about the open mag well!!!!!!!!!!!