You might start to fall because you trip, but it's the invisible force of gravity that makes you end up on the ground. Gravity is a real downer. It's what tugs everything on Earth towards the ground...
I believe you can most definitely fall for someone several times. Why do you think people make up after they break up? Because when they set eyes on each other they fall in love all over again. You...
Careful driving. With speed and bad moves it could fall over. It has a low centre of gravity, by keeping heavy weights low and upperstructure made light (aluminium)