"Oren" wrote in message
...

Here is a photo of a 2x4.

http://www.ihc.fiu.edu/images/wind_damage.jpg

I figured out how implausibly light things like straws can embed in a
tree or phone pole. The wood cracks open lengthwise on the upwind
tension side when it bends in the wind. The cracks close on trapped
debris when it straightens out.

jsw