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Why are my night shots photos green?

I used a disposable camera and took shots of the fireworks at night. When I got them back from walmart one hour photo all the night shots in the sky of the fireworks were green and looked awful. The regular pictures on the roll looked fine. Is it old film? Is there a certain term for what happened. The photo lab worker said it was called something but couldnt remember what it was called. There were no trees or background behind the fireworks. Just the black sky and the bright lights of the fireworks. I thought something would come out. Does it have something to do with having the flash? Any help would do. The term or an explanation. The more detailed the better. Thanks alot.

Disposable cameras usually do not take long exposures needed when shooting fireworks.

The green shift has something to do with the colour balance of the film (daylight) and the night scene with various colours of fireworks illuminating the scene. If you notice many photos areas that should be black in the photo will be either slightly green or blue … not a true black.

If there had been something wrong with the film, your “regular” pictures would have shown a problem as well.

You need to use an adjustable camera to capture fireworks. A camera that allows you to open the shutter long enough to capture two or three bursts.