[quote]Exotic engrams really don't drop. It's not possible. You didn't miss anything. Also the game has a failsafe that automatically sends any engram that's blue or better to the postmaster. So if somehow the game broke and an exotic dropped it would be in the mail[/quote] This is correct. Exotic Engrams never drop and can only be purchased from Xur. More than likely you saw a green engram that was colored yellow by the death screen effect.