Igadevil
Mr. Kamen Rider
Actually, given the over-the-top way's that everybody screams in Blade, you might as well just say the screaming in Blade
That moment in particular though stands out, as it single-handedly launched a thousand Photoshops, and it was hard to find a Blade-Box flash movie that didn't include it. There are some that come pretty close, but the Tachibana scream is on a whole 'nother level.