It is July 18, 2009 in the country town of Bruga in the land down under, and a young chap is peacefully wandering along the street on his way to a bottle-O. Almost without noticing, he knocks down the price display board of a local butcher. Just as he pauses to consider whether undoing his blunder would be a gift to society, he has a flashback from 5 years ago at the ripe age of 23.
I agree with the others about the flashback thing. Not just the impending backstory, but "he has a flashback from..." that whole clause is very telly. It's a preamble telling me about the flashback and not the actual flashback. If what happened 5 years ago is important, you can either start 5 years ago or you can find ways to drip-feed the important details into the narrative.
That said, I found it very engaging up until that point. I'd read on to find out whether he's going to consider giving humanity the gift of undoing his blunder with the price display board.