Here are a couple screencaps from Prince's performance at the Super Bowl XLI halftime show earlier tonight ... this was during "Purple Rain," the last song he played, when a white curtain was blown upwards to display his silhouette as he played the guitar solo.
From the opposite side:
Yes, the curvy appendage is part of the guitar.
Intentional? Let's assume it was, just for fun, if only to make the follow-up NY Times article "A Noncontroversial Prince, Just the Way the N.F.L. Likes Him" that much funnier ... or at least the closing line: "He looked as if he were getting away with something."
I salute you, sir. Well done.