The problem here is one many of us have hit: a printed model comes out too light for its purpose. The maker wanted extra weight inside a part and tried to get it by pausing a job and packing the internal structure with sand. On paper that sounds clever. In practice it turned into a lesson the rest of us can learn for free.
The part itself is an oval container or frame printed in light blue filament with an open internal lattice, using gyroid infill on a Bambu Lab machine, an A1 mini. The maker placed a pause before the top layer of the gyroid infill printed, filled the model with sand, then pressed play to resume. The mistake became obvious about half a second later.
The standout detail is the toolhead fan. Its strength had been underestimated, and once printing resumed it blew the fine sand straight out of the model. The nozzle then dispersed the powder into the internal cavities and across the print bed, while the toolhead traveled rapidly back and forth through it. Fine white powder ended up over the build plate and the print's top opening.
The maker spent a few seconds checking whether sand would blow off the rails and other critical parts, then shut the printer down immediately. The A1 mini is reportedly gone, and there is an open question about whether epoxy would stick to the layers still to be printed.