Plasma balls
We would love to investigate plasma balls as well. I hadn't realised that they were a 'frequent' appearance after a lightning strike (by 'frequent' I mean more than one person has encountered it!), but I've probably heard about 4 or 5 reports of the same phenomenon now. I guess it requires the same conditions as St Elmo's, but we should be ready with cameras to capture a potential plasma ball going down the aisle as well! Anyone have any description of how fast the plasma ball might move?
Thanks again to everyone who's responded so far. I have been following up all the leads you have given me, though not yet pinned down exactly where is the best location - or found myself someone mad enough to take us up there in a storm...