When you have been behind the wheel of your Deuce for four hours and you stop for fuel, and you go into the quickie mart to buy that huge cup of coffee you have been dreaming about for the entire drive, and you make yourself a perfect 24 oz cup of hot coffee with just the right amount of cream and sugar, and you are dying to drink that great cup of coffee, and you pay for the fuel and are about to climb up into the deuce, so you place the coffee cup on the floor of the Deuce so that you will not spill it while climbing up - you know, the cup you have been waiting hours to drink - and then you swing up into the seat, then what you do not want to do at this point is to knock over the coffee with your big a$$ feet, especially if you are trying to make a ferry and you can't spare the few minutes to go back inside for another cup.
You do not want to do this.