The funniest Bubba rig I have seen, was back in 1978.  I worked for 8 years in the shipyards as a Diesel Mechanic/Welder/anythingelsethatneededdone.  
When the tugboat crews would show up for a 21 day trip down the Intercoastal Canal, they would park their cars at the main office, catch a ride to the boats on the next truck heading out.  They would leave their car keys and we would park them in secured parking.  One day, I drew the short straw and got to ferry cars all morning from the office to the parking area.  I got in one car which as I remember was a Toyota.  There was a funnel and tube going through the dashboard, and several empty oilcans on the floor on the passenger side.  When the crew came back 21 days later, I looked up the owner of the Toyota to ask what the funnel rig was.  He said that every 150 miles, he had to add a quart of oil to the engine, so instead of stopping, he would reach behind the drivers seat, grab a quart , then pour it into the funnel which ended up in the engine.  
That had to be the funniest thing I saw out there!
Bill