When a man and woman are having sex 'doggie-style', with the man wearting a condom, and the man says,
"Oh look, a
disappearing panda."
And when the woman turns to look at the man, he quickly
pulls out, removes the condom and
snaps her in the eye with it.
As in the
previous example, which did not state
the sex being
engaged in was 'doggie-style',
"I can't believe how dumb she is. I actually pulled a Disappearing Panda on her last night."