I didn't experience this myself, but a friend recently reported being on a NW commuter flight that diverted due to a heart attack enroute. Upon announcing the diversion, the pilot dove out of the sky at a dramatic angle, actually arriving at the bottom of the dive earler than necessary and maintaining an unusually low altitude at top speed to the airport. Upon touchdown my friend said he thought the roller-coaster part of the ride was over and had just begun to relax when it became apparent that the pilot was not slowing the plane as normal, but continued to race to the gate at maximum "taxi" speed, and ended by hitting the brakes hard in a way that pitched everyone forward in their seats. With good reason, of course.

Ultimately, the man was able to walk off the plane, with assistance, so we all hope he is doing well.