"Ladies and Gentlemen, your nightmare for the next few nights." Also I think Megidramon is definitely scarier than Skullgreymon mostly because of two things.
1. It's mere presence could cause the apocalypse.
2. It lacks the derp face that Skullgreymon has.
Megidramon is epic. When I was younger, I was always so mad that Guilmon never Digivolved into Megidra after his initial "incident". I've always loved him far more than Gallantmon (who still PWNS, though XP).