Took them 20 mins just to find my brain when I had the scan at Cranditz. This was probably due to them initially attaching the electrodes to my head - obviously about a metre out.
Extending the thread; what about the 'crazy' test used in pilot selection by the Swedes that the RAF tried out on a few FJ bods in the '90s. I was pulled out of a hat for that one, and I was told by a doc some years later that there was a strong negative correlation, i.e. the RAF would be best hiring guys that the swedes weeded out for being nuts, as they had the best chance of passing RAF training?! Apparently the reason for not adopting it was the inevitable comments if the press ever got to hear about it.