10 years ago...

[splent]

Tonight.

 My friends,  my father, and I were all in Chicago to see dream theater. They didn't play until the 18th, so on the 17th we decide to go barhopping… We ended up at an extremely crowded Irish pub for a while, did a few Irish car bomb's, had some Guinness, you know. We ended up getting something to eat afterwords, and ended up at an L stop to head back to our hotel.

 On the opposite platform, a random African-American man yelled down to the street from the platform:

"HAPPY ST PATRICKS DAY MOTHAFUCKA!!!!!"

 It was one of the greatest moments of my life.

[El Barto]

I suspect that some language other than English has a word for such things. I have no idea how you'd refer to it, but I've had moments just like that and understand exactly where you're coming from. Every once in a while everything just lines up perfectly. The scene, your mindset, the people you're with, the various chemicals you've ingested, random elements, pretty much the entire universe. Everything just lands in perfect alignment.

[jasc15]

I suspect that some language other than English has a word for such things.

Not related to Splent's experience, but there is a German word Torschlusspanik or "gate-closing fear", which is the fear of diminishing opportunities as you age.