Supposedly you need to carry a bomb all the way until you find another ship with a bomb (you'll need to play through and remember where the next one is) and detonate the bomb on that ship and you'll get a power up, you need to have a level 3 weapon already.



I somehow did it there, if you notice you'll see the side pods are much larger as are the shots I'm firing. I didn't know how I'd done it until I looked it up later, but I haven't been able to do it since. =/