Lincoln Cent With Feather?

Got a hold of a Brinks never-unwrapped 1987-D Lincoln Cent roll. Found this coin in there and didn't know what to make of it, any ideas? Third party graded MS66 but not a variety. Thoughts? It's kind of like a feather sticking down from the back of Lincoln's head.
A Barber Quartet is made up of Nickels, Dimes, Quarters, and Halves.
2
Comments
Bubble?
My guess is the plating is bubbled.
"A dog breaks your heart only one time and that is when they pass on". Unknown
cool Abe!

"Jesus died for you and for me, Thank you,Jesus"!!!
--- If it should happen I die and leave this world and you want to remember me. Please only remember my opening Sig Line.Ye olde tomahawk Abe!
bob
Looks like a plating bubble. Still real nice.
I kinda like it
Plating blister, as others have said. These are common in copper plated Lincolns, especially earlier ones. There is also one on the neck and a few other small ones.
IMO, plating blister are undesirable on higher grade Lincolns. There is always a chance that it was caused by dirt/contamination left on the planchet and could corrode the zinc over time, especially if the copper plating is breached. Slabbing does help minimize the chances