These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Bugsy Malone
Special Effect Failure: A literal kind. Specifically, the splurge guns, which were supposed to actually shoot wax balls filled with cream (similar to what we see being loaded in one shot). When they proved problematic, it was decided that they would be shown shooting ping-pong balls, with the cream only shown in shots that don't actually feature the guns. This is most evident in the opening scene.