Frank Lentini, in Reverse
For those of you that don't get the reference, Frank Lentini was famously known as the "Three Legged Man":
Whereas the kid in the first picture has three arms. Of course, the proverbial $64,000 question is whether the additional limb is due to the presence of a nascent or parasitic twin, or is it merely the result of a division/duplication error (Frank Lentini's additional leg was part of a parasitic twin). So far the evidence favors the latter theory, as both arms are located consecutively in the proper biological place and are nearly complete, yet are apparently nonfunctional.