Zoom brust?

Not sure what you will all make of this! I have been experimenting with what I believe is called " zoom burst"! This is a single frame exposure, using the bulb setting I focused on what appears the small image of the bottle, fire the shutter then zoom from 28mm to 300mm before the shutter is cancelled.
I must say it was the best of several (many ) attempts. Other food for thought the Gin bottle used is plastic (not glass ) is it just me or is that just wrong?
Have a good weekend one and all :)