It's so powerful that it makes air burn!
Something little bit less flaming for a change -> .45ACP
And also 3D to visualize those structures:
Compare 2D and 3D images. You can get so much more info out of the stereo pair. For example that round flame structure is actually behind the barrel line and not above like it appears to be in 2D image.
http://www.kuulapaa.com/home/highspeed.html