Fireworks displays, and how I(S) blew the shot

Climbed up the water tower with 2 cameras and tripods for a better view.

Shameless self-portrait over. I'll get straight to the point.

If you're shooting on a tripod, never forget to turn off the image stabilization (IS, Canon)/vibration reduction (VR, Nikon)/vibration compensation (VC, Tamron) of the lens. It's a handy feature for handheld shooting but it turns tripod mounted shots into tripod mounted shits, as demonstrated below.