on hl when ur on the level where ur facing the green tentacles in blast furnace i think, theres a bit where u come outside across a walkway and i looked over and purely by chance i saw somit on the other side of the map.........a dancing green scientist, i guess he was accidentally put in the wrong place but i think hes actually meant to be getting electricuted ill try to get screenie hes just floating there dancing/getting electricuted and is green due to the radioactive waste below him