YKYAEM if *true story* you go to turn on your cruise control, hit the button for "ON" and then press "SET" you go driving down the road about a mile, try to hit the gas because you seem to be slowing down, nothing happens, and realize you put you car in neutral before you tried putting on the cruise control so that didn't turn on and you realized you have been coasting the WHOLE time (GOOD TIMES)
or
*Also true story* You press "ON" on your cruise control then press "SET" and drive down the road about .6 miles and get to a hill and start to slow down... you are like "What the heck?!" and realized that when you pressed the "ON" button, the cruise control was already set to "ON" so you really turned it OFF and have been coasting the whole time...