Funny that you mentioned this...Here's a little story from me...went for a late night walk about a week ago or so cause I wanted to walk the 3.3km for my 10km egg.
First, I caught my first ever wild Blastoise (wasn't a good one but still pretty sweet). Literally 5 mins later, I caught my 2nd ever wild Vaporean CP 1526 (I know crazy right)
Then I was 2 mins away from home and I FINALLY hatched my first ever Snorlax with an IV of 96%.
I'd say not bad for a 1 hour late night walk! lol