Oh come on. We were told that all flights would cease immediately in fact I seem to recall some silly person even suggesting that aircraft leaving the UK would be banned altogether from EU airspace. I can't remember the reason given, something to do with our air traffic controllers not complying with some EU rule or another apparently.
Rolls Royce were going to go bust because they would no longer be able to sell their engines to Airbus. Why an engine sitting in the factory and fully compliant with EU standards the day before Brexit would suddenly not be the day after wasn't explained. Nor was the other small problem, namely that the only other source of engines for them are the likes of GE in the US, not a member of the EU last time I checked, so how could they buy them from them.
Last, but my favourite, was to see the funk Cameron and co got in as the day of judgement approached, and it began to dawn on them that this wasn't going to be the slam dunk they had thought, and they might actually lose. Then we got Osbourne 's speech where he warned solemnly of some kind of immediate economic Armageddon if we do much as voted to leave, much less actually did it. Watch it, it's really funny. Now someone pointed out that the pound did take a big hit the next day. What of course they don't point out, because it's a little inconvenient, is that once the bankers had got over their hissy fit it bounced back again pretty quickly.