Yep, you guessed it. I walked right past my coffee travel mug and got into my car and started to back out of the garage. Looking back I caught the coffee travel mug out the corner of my eye. My natural reaction was to hit the brakes and in mid-motion of hitting the brakes I was screaming in my head "No! No! No! No!". Why? Inertia. That's why. The travel mug stayed steady as the car moved. Once I hit the brakes, the car stopped, but the travel mug had its own motion (inertia). Friction was not able to hold the coffee travel mug in place, so it continued to move backward, tipping over, crashing to the concrete driveway, and shattering in 100 pieces. :-( I liked that coffee travel mug!!!
So there you have it. I challenged inertia (and gravity) and it won. DAMN YOU INERTIA!!!!