1/ New ramp rat, attached to an aircraft headset as he "walks" his first aircraft back upon pushback. Just as they stop (but before the ramp rat disconnects the towbar), and another, EVIL ramp rat runs up and an BREATHLESSLY tells newbie Rat that "Don't let the airplane takeoff--they've got a bent Johnson rod!" or some such item that's sure to result in certain doom. My personal favorite variation was a newbie-rat that fancied himself a real ladies man, and the "malfunction" on his flight was a "bent Fallopian tube", which he dutifully reported to the captain. The good captain, being unamused, and otherwise unbelieving that anyone could be so ignorant of female anatomy, had them tow it BACK to the gate.
2/ Saw this happen on a Piedmont 727, but am sure it's been done elsewhere. The wall to the right of the F/E has on the other side the forward lav. We were on a 3:00 flight, and the first couple of time this new F/A came into the cockpit, the F/E was always bending down to his right and looking into a small door he had open in that wall adjoining the lav. The third time she came up front, the F/E pretended like he didn't see her enter the cockpit, and was engaging the other two pilots in some locker room conversation about this really cute girl in the forward lav....etc. The new F/A turns red and beats feet out of the cockpit, never to be seen again. Well, until the end of the flight when they told her she'd been conned..
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.