Went to Lone Rock, Wisconsin today for the $100 hamburger , with excellent
VFR conditions, and winds light and variable.

After lunch we saw a 210 taxi to the approach end of runway 27 (clearly
visible from the the far end at the restaurant). Just as he started his
takeoff roll, another guy in a 152 taxied onto runway 9, and announced his
departure from runway 9! (yes the opposite direction, with another plane
coming directly at him down the runway.

The 210 did a very steep climb straight ahead, while the 152 did some pretty
radical low level maneuvering to avoid a head on collision. Perhaps the guy
in the 152 assumed the 210 had departed on 09 (there are no taxiways, so
everything is a back taxi, and the winds were light and variable), and the
guy in the 210 wasn't taking at all over unicom, but even so, the far end of
the runway was clearly visible, and there was a big as life 210 rolling in
the opposite direction.

It was about as close to a catastrophe as I'd ever seen, and the guy in my
right seat (CFI, multi, etc) agreed that the guy in the 152 probably never
looked. I'm not sure what to learn from theexperience, but it sure looked
like someone wasn't paying attention.