Untool of the day:
Taxiing out of ATL last night, I changed radio 2 to guard and selected radio 1 for ground, but didn't change the transmitter from 2...
Me- "Ground Delta xxx D short of G with P...."
Voice- ONNNN GUAAARD!!!
Me- "Doh..." (changes xmitter)
Me- "Ground, blah blah blah"
Same Voice- OOONNNN GUAAARD!!!
(I frantically look down and try to figure out the problem"
Same Voice- "kidding, Delta xxx, Atlanta Ground, taxi runway 8R via taxi G and E, verify you have ATIS P"
Me- (read it back while half way laughing still) "What, you didn't hear that i have P on guard?"
.. that was a good one.