Ford used to be a good actor, but he's been sleepwalking through his movie roles for over 15 years now. He clearly stopped giving a shit long ago. It's a shame, since I used to be a huge fan of his.
And Biff's right about the ad-libbing in the scene where Indy gunned down the swordsman. A big long fight was planned, but Ford had the hershey squirts and suggested he just blow the guy away instead.
Worked out for the best, I say. :)

