There are certain chiropractic technique systems that teach how to mark on an x-ray to see if a subluxation exists. Sort of a controversial practice – at least at LACC. We were taught that subluxations can not be seen on x-rays. This cartoon takes this practice one step further. Vert is scoping Verta with a precision construction instrument, and emphatically blurting out that he sees a PRS at L2 [a fancy way of saying that L2 has a subluxation that is stuck backward with the right side up].