Listening to John Williams discuss finishing his work on Indian
Jones and the Kingdom of the Crystal Skull on a YouTube video
at 01:22 into the clip he says he finished work on the seventh reel
and that each reel is about 20 minutes.
So "come on, genius"
-- that math comes out top 7x20 minutes
= 140 minutes, 140/60 minutes =
2 hours and 20 minutes!
Thanks to Grethe at Harrison