I had a one guy whose (thoughtful) wife had bought him a surprise trial lesson. Only problem was he suffered from SEVERE vertigo! He was nearly sick just thinking about it but because it was in a heli I told him I would only go as high as he said. . . Turned out not a touch of vertigo and he absolutely loved it!
His wife didn't seem to share the joy. . . strange?
Another very large guy froze on the controls just as we were lifting. . As the a/c was rolling slowly around the left skid . . "OK I have control. . . I have control. . I have. . . LET GO!!!!!"
Won't do that again. .