Recently BFFB were performing at Mechelsepleinfeesten, invited by Villanella, in Antwerp.
This experiment consists of using an item of food as a temporary light source, by putting 220 Volt on it. The videos are in slow motion, so the sound is morphed as well.
Do not touch the food item whilst the electricity is on. You can however eat it afterwards, if you want to.
Disclaimer: potentially very dangerous, best to have access to your electricity mains as they tend to create short circuits.