Would be really interested if others have similar experiences!
I've been thinking a lot recently about how strange (my) memory is, how I can be thinking about, say, needing to buy milk and then BOOM I'll be remembering, say, riding a llama in Peru. The memory is SO totally unrelated to the thing that I was doing or thinking about when the memory struck me.
I always try to think backwards to work out the association but no, I definitely wasn't riding the llama to the shop to buy milk, nor did I milk the llama, etc etc. I also know some memories are triggered by smells but obviously those times you're probably able to pick up on it if you're thinking about it.
I feel like it happens allllll the time, many times a day, I asked DH if he had a similar thing and he said what the hell are you talking about no.
I know it's a bit of a weird one, but would just love to know if there are other weirdos out there 
P.s. sometimes it will be a memory I've often thought about, other times it can be a memory I haven't remembered since it happened, say 20 years ago. Is this common?!