First, I love ATC and the controllers are, by and large have been great. Occasionally though, you'll some quirky stuff from ATC. I have been training a student this week and we were sitting on the ramp at a small class D on the Carolina coast trying to call ground/clearance and even tower for our IFR clearance x (a bunch) with no answer. Finally, I called the number and spoke with a man that said the controller may be "resetting" the radios (???). In any case, we got the controller on the next call and collected out IFR and Taxi clearances. When we reached the take-off taxiway entry, we did the run up and told the controller we were ready for take-off. The controller just said "Roger" and that was it. Now generally, I'll get a "hold for release," or a release and take-off clearance, not just "Roger." My student keyed up and asked (over the air), "are we cleared for take-off." The controller then said, "I was acknowledging your transmission, however you are currently cleared to do absolutely nothing." No exactly standard phraseology, but amusing none-the-less. Any other ATC stories on the lighter side?