Well, I suppose it's not that disturbing, but it is really weird!  I couldn't think of another synonym for weird that starts with "d."  This sorta-doinker showed up a few months ago and I figured that it would die off as it was struggling to pop out of the base of the largest Dypsis Pembana trunk.  The main trunk is now about 6 feet of trunk and 12 feet overall, and still growing fine.  And the doinker is now about 3 feet overall and seems to be growing normally.  Very weird, but here it is!