Yep four strokes will run backward for a short time. Usually it is after they have sort of flooded and some fuel is in the exhaust. It sure is a susprise isn't it.

One thing to watch landing into a strong wind. Keep some speed up. I've saw more than one plane hoovering into a strong head wind and setteling down like a chopter when the wind decided to just stop. The plane drops like a rock at that point. Keep a bit of forward motion going in case the wind shifts or quits. I lost my 4*60 a month back because I got disorentated and turned down wind vs up wind on final. I was going slow enough that the turn caused me to loose air speed and it went in like a lawn dart. You just got to keep up air speed.

Don