Times sure have changed in the 19 years since Harrison Ford last donned the signature fedora of thrill-seeking archaeologist Indiana Jones. The viral spread of the trailer for "Indiana Jones and the Kingdom of the Crystal Skull" is proof of that.

The trailer for the May 22 release has drawn highly enthusiastic responses in theaters. But it may have had its biggest impact online, on a younger audience that may not think of Ford, 65, as equal to today's spry action heroes.