He showed Ellen his war wound from a recent on-set mishap, and told her the story that went with it!
Jake Gyllenhaal's Hand Injury
Jake Gyllenhaal on Jimmy Kimmel Live PART 1
"You Don't Know Jake" with Jake Gyllenhaal
Jake Gyllenhaal on David Letterman 3 September 2013
Nobody Says Jake Gyllenhaal's Name Correctly - CONAN on TBS
Jake Gyllenhaal's Happy Thanksgiving
Jake Gyllenhaal Said WHAT About Hugh Jackman??