I personaly would guess that he broke his leg skiing...
actually someone spot him in LA around the Nu Image offices (damn, and I live in LA now, I could have been there!)
http://www.defamer.com/hollywood/diary/sightings/hollywood-privacywatch-jake-gyllenhaal-flees-applebees-034716.php
· Rollin down the sidewalk on Wilshire today (2/24) enjoying the sunshine and who was kickin’ it Miracle Mile-styles at an outside table of a local office-drone-friendly lunch spot???? None other than Ivan Drago a.k.a. Dolph Lundgren. The patio lunch was adjacent to the squat, mirrored Nu Image and Millennium Films office building. The Dolph was looking ripped in his pale blue Izod golf shirt, jeans, celeb-special brown sunglasses with the light, faded tint. He had a black cast on his right foot and crutches on the ground behind him. Meeting with scruffy slouchy guy. No Brigette Nielsen in sight.