You really are thick.
Theres always water under the bridge but at low tide it is very shallow so anybody jumping will likely die. If they jump at high tide theres a chance they'll get pulled out by lifeboat.
Waiters in this country get paid a decent-ish wage. In the US however its totally different, their basic wage is tiny and tips are their main income, a decent waiter in the US will make a couple of hundred $ in a night.
Most projectors these days should be able to adjust to that.
The only differences are digital keystone correction and physical keystone correction.
This might help explain them better than I can.
http://gizmodo.com/gadgets/home-entertainment/projector-thunderdome-variable-lens-shifting-vs-keystone-correction-217383.php