I had one mission where I was going to test some booster on take off and then test radial parachutes at some altitude, and then reach space (this was early on). I slapped the radial chutes on the booster, and planned to continue my ascent by deploying the chutes while releasing the booster, so I could continue climbing to space. About the time I was going to hit the chutes (and simultaneously release the booster they were attached to) I realized I had forgotten to put any other chutes on the capsule! I quickly changed the staging to only deploy chutes, then I had to ride it out all the way to the ground, with all of that extra fuel and weight of the original booster. Since this was all way down on the rocket, I landed nose (capsule) down at a much higher velocity than I wanted. I hit the ocean, though, and through some miracle (or through Jeb's overwhelming awesomeness) the capsule survived, though the rest of the rocket broke up! Jeb survived, 2/3 missions complete, and I recovered money from the capsule. I was mighty scared, but jeb never flinched.