They are blowing a hole THROUGh a wall or a barrier or something - that’s what the corner is. They’re going to go THROUGH when the explosion finishes.
I think you’re right. Check these similar photos at Cobra Gold 2014. Note plywood. Interesting none the less.
http://archive.defense.gov/photoessays/PhotoEssaySS.aspx?ID=4877
http://archive.defense.gov/dodcmsshare/photoessay/2014-02/hires_140215-M-OY715-054a.jpg
http://archive.defense.gov/dodcmsshare/photoessay/2014-02/hires_140215-M-OY715-040a.jpg
