A Nanotech syringe is inserted up their asses, and tiny robots build themselves into a heatproof mesh wall that separates their guts from their meat and vital organs.

Then the suction devices inject heated plasma through their pipes. Their abdominal cavities are turned into ovens.

The crew's genitals are incinerated slowly as the the atmosphere inside heats up hundreds of thousands of degrees.

They scream and writhe on the spot as they are nuetered, and their intestines are incenerated, and the remaining black ash vacuumed out of their hollowed bellies.