Here's your sign
When comedian Bill Engval sees somebody do something stupid he rewards them with a sign telling them so. Got mine.
Had the coach 3 years and have always had difficulty filling it with oil. Neck too short and a terrible angle. At last oil change I was helping the young man trying to fill with oil and as usual what a mess. Grizzled veteran mechanic comes up behind us, informs us we were morons, grasped the fill tube and pulled on it. VOILA. Fill tube slides out of it's sleeve and rotates for easy fill.
As always, nothing so awesome as ignorance in action.