Alright, so I was out lastnight taking some pratice shots. Here are 4 of them. Please give me some feedback so I can adjust for tonights fireworks. Also has anyone played around with keeping your shutter open, and just put something black in front of your lens and then remove it to get multiple bursts? If so, please explain to me the details.Thanks a bunch.

Camera: Nikon D60
Exposure: 2.7
Aperture: f/18.0
Focal Length: 40 mm
Focal Length: 40.0 mm
ISO Speed: 100

Camera: Nikon D60
Exposure: 2.1
Aperture: f/18.0
Focal Length: 40 mm
Focal Length: 40.0 mm
ISO Speed: 100

Camera: Nikon D60
Exposure: 1.5
Aperture: f/18.0
Focal Length: 40 mm
Focal Length: 40.0 mm
ISO Speed: 100

Camera: Nikon D60
Exposure: 2.9
Aperture: f/18.0
Focal Length: 48 mm
Focal Length: 47.6 mm
ISO Speed: 100
Ounce again Thanks a bunch, and any quick suggestions would be greatly appreceiated. Thanks
Joshua