Not quite a lightning strike, but...
I have heard of this happening but never actually spoke with anyone who had experienced this until about a month ago. One of our crewmembers was a flight engineer on a B727 and was in St. Elmos. He was facing forward with his armrest down. A "ball" of the St. Elmo's entered the cockpit and discharged (with a bang) on the end of his armrest. He said he could not feel his hand/tingling sensation for almost half an hour.