User blog comment:Dr. Feelgood/Interesting glitch/@comment-5686539-20130615230041

This is a well-known bug and happens for a number of reasons. Zer0's skill Bore will penetrate BNK-3R and strike multiple critical hits. This will cause so much damage, that sometimes the Bunker will drop dead on the spot and spew its loot over the edge of the map. The only way to truly avoid this bug is to not invest into Bore. If you really need Bore, then use a low damage weapon and take short bursts/single shots at the Bunker. It will still do massive damage if those shots penetrate multiple crit points, but not as much as a high-powered weapon or going full-auto.