BOO!
I would...
Screech at it
Scream at it
Grab at it
Groan at it
Lunge at it
Laugh at it
Mumble and moan at it
Bark at it
Bawl at it
Rage at it
Rail at it
Hiss at it
Howl at it
Whimper and wail at it
Squeal at it
Squawk at it
Flap at it
Fly at it
Dig at it
Dive at it
Throw custard pies at it
Give it a whole lot of verbal abuse
But I wouldn't...
Say “BOO!” to a goose