Thanks Deb and Denise,
The front tire had a flat the previous day which we patched and rode 40 miles on it, got up the next day and inflated to 114psi. Thinking back I did make a sharp left turn before the kaboom, so maybe the tube was pinched at that angle. New gaterskins arrive twrrw.

Nice links with great pictures...you must have to have super strong nimble fingers to get that tire on w/o levers!
happy riding!