I had an experience that scared the living daylights out of me this past week. I was at my local airport, gathering my belongings out of the J and a PA28 taxied by for a departure from the displaced landing threshold for Rwy 21. They are adding an overrun for Rwy 03, so Rwy 21 has a displaced threshold for landing. Full length available for departure. It was a very hot (mid 90's at 1030A) morning. No biggie really but I was thinking why wouldn't you just use the full length. Pilot's perogative.
Here's where I got scared. I was on the wing walk bent over looking into the Mooney and something just told me to watch the Cherokee depart. I turned around as he was powered up and rolling and I instictively scanned the runway (I'm ATC..can't help it) and sure as shine, there was a C172 on a 1/4 mile final, opposite direction, for Rwy 03!! I literally punched 911 into my cell (didn't call) and jumped off the wing and just knew there was going to be a collision. The Cherokee got airborne and the Cessna pulled to the right and stopped. It may not have been as close in reality as it appeared but, it was an incredibly dangerous situation nonetheless. I have no idea which of the two was confused as to where the other one was or if one or the other was not communicating on unicom. It is just a really good reminder to keep your eyes open all the time, especially at an uncontrolled field. It certainly got my heart pumping!