1 SFX: shove! {Bonnie pushes the runaway trolley away from the five physicists}
2 SFX: Crash!! {it crashes into Simon}
3 Professor 1: Oh! It's horrible! What a tragedy!
4 Professor 2: Yes! All that spilt tea will make the biscuits soggy!

Oh dear. That really is a tragedy.

Imagine this scenario: A runaway trolley is hurtling along a track towards five immobile people. You can divert the trolley onto another track by pulling a lever, but on the other track is a nicely laid out afternoon tea. If the trolley hits it, the tea will spill onto the biscuits, making them soggy. Do you pull the lever???

I always find the trolley problem amusing because here in Australia the most common use of the word "trolley" is for a supermarket trolley - the thing you push down the aisles of a supermarket and put your shopping into. So I always envision a runaway shopping trolley. It would have been much better if the originator had named it the "tram problem", or even the "train problem".