This has happened twice in similar circumstances; I was landed on Minmus, then clicked the EVA button, pressed space to let go, and pressed R to activate the jetpack all in quick succession. The game then crashed with https://dl.dropboxusercontent.com/u/18741755/logs.zip these error logs. Mods installed: CrowdSourcedScience DistantObjectEnhancement KerbalEngineer KerbalJointReinforcement KSP-AVC Hotrockets SmokeScreen (for hotrockets) SurfaceLights Kerbal Alarm Clock No idea if it is actually any of these mods or just a stock issue, but any help would be appreciated.