I just cannot comprehend how the OP can say that leaving the EU reminds me of the Berlin Wall coming down. As Callistemon said, it feels distinctly like a wall going UP.
I just feel tremendous sadness and loss.
And I hope we won't have Independence Day plus two, three, four threads...
I know I can just skip on by (and will on future if they pop up).
Also, I think those of us who are feeling pretty "down" about leaving the EU are not all pessimists as ananimous thinks. If anything, I'm a realist, often an optimist and comfortable with that. Some people who voted remain are definitely optimists (my daughter is one). These facts don't mean you stop thinking though! If you are an optimist but accidentally chop of your arm with a chain saw and it can't be sewn back on you would be very odd to think, "great, I can have a shiny new prosthetic arm", you will grieve the loss of the arm you once had. This doesn't mean you are a pessimist! Just think about it!