Here's a weird one.
Extreme athlete Dean Potter died this month when his 'squirrel' wingsuit apparently didn't operate properly. He and a companion were killed, BASE jumping off Yosemite, in an area they'd done before. (His body-mounted video camera apparently caught details...but it's being analyzed by the police right now.)
What makes that strange, as well as weird, is that Potter had become even more famous recently -- and not because he'd improved his technique. Instead, he was taking his dog on his back during jumps.
Fortunately, the dog wasn't with him on the fatal plunge.