Post the videogame boss that scared you most, as a child or whatever.

Mine was SA-X from Metroid: Fusion. It scared the living fuck out of me as a child. I played the game when I was like 7 and I was shitting the entire time. It was the whole "if he sees you, run faster than you've ever run in your life" that really got me, I never did let it catch me until I played it a second time, but it was all because I was so stricken with fear by his very lurking presence that I couldn't bear to find out what would happen to me to stay around and let him rip me to shreds.