What's the deal with Atomic Robokid Special?

[Spector]

I'm playing this shooter on cruise control, whipping it like a pro. Then on stage 7, I go down a shaft, shoot a few drones and meet a brick wall wiith no exit. I don't know what to do next. Dammit - I was whipping this mother like there was no tomorrow. I just don't understand what I'm supposed to do to get past that stage.

[Duo_R]

I am getting flashbacks of playing X-Men for the Genesis......

[_Paul]

I'm playing this shooter on cruise control, whipping it like a pro. Then on stage 7, I go down a shaft, shoot a few drones and meet a brick wall wiith no exit. I don't know what to do next. Dammit - I was whipping this mother like there was no tomorrow. I just don't understand what I'm supposed to do to get past that stage.

Try shooting this bit of wall:
/atomicrobokidspecial002jj2.png