I killed a female housefly that hadn’t laid eggs before they hatched. This is the mess it made on my laptop (not counting other smaller piles of maggots that landed elsewhere).
There’s another picture, if you can stomach it.
The body cavity is empty besides the maggots. The maggots were numerous enough that they moved the carcass as they writhed around.
The photos are blurry because I shot them in a hurry — knowing that I should have been cleaning this up.