Need a time waster that helps you comprehend external ballistics?
Whack the Penguin
My record is 316 "units" (ther is no indication for NASA Mars guys as to whether the distance is metric or english...)
High angle whacks result in a very "pointed" landing, as the penguin's beak digs into the ice.
Watch out for the low glancing, skipping shots, they cause too much friction on each skip.
The sweet spot seems to be about a 35 degree angle, but my boss got it out to 322, for the lunch time record...
Flash, it's a wonderful thing...