Just one

I was on the way home when Sito was on his way out for an event. We were chatting on the phone, interrupted only by broken signals along the way, when he realised that our trains would pass each other!

mf: Oh, we can spot each other!
Sito: It'll be too fast..

And of course he was right.

But as our trains passed each other somewhere between Commonwealth and Queenstown, I was sure that if we could just play back in slow motion what we'd seen, we would find each other in one of a thousand frames :)