The bee noise is a part of the Killer B concept. The Astros have at least 4 players whose name begins with a B: Biggio, Bagwell, Berkman and Backe. There used to be more. Anyway, since there's a number of "B's" the created this marketing concept of the Killer B's, along with the buzzing noise, the Bee Hive, etc.
Backe! Maybe he should have pitched game 1, instead of the Rocket.
Well, I'm a bit slow tonight. Must be that sleep deprivation.