API...Beaverfalls, Idahoe.
FAA crash investigators have released this information from the site of the John Walton ultralite crash site.
"It is our conclusion from evidence we have found.... that the cause of the crash was from a tear in the carbon fiber composite that made up the skin of the aircrafts wing. We also found evidence that Mr. Walton made a valiant attempt too patch the tear with a substance known as buttlint 721." (The strongest fiber known too man.)
"We further conclude that had Mr. Walton been able too produce enough of this substance too effect the repair, he would still be alive today. Unfortunatly, Mr. Walton suffered from a hereditary disease known as Tightass-Syndrome. This disease is known to cause extreme tension in the area of the splincter, (an area where BL 721 is normally harvested). It also causes the sufferer the inability too spend money and hire qualified people that know how too build ultralite aircraft."

I hear they are making space suits out of the stuff too....can great pressure from the outside...and from within the suit...