I'm not sure if this is thread worthy and i have no problem deleting it if it's stupid, but i'll give it a try x)
It often happens to me, when i'm listening to ipod, that stuff happen the second a new song starts (or ends). But also, by approximately knowing how long the songs are, it helps me "measure" the time without actually checking what time it is.
for example. it usually takes me about a Metanoia to get to school. If I'm not in a hurry, than it takes me a bit longer- Siberian Breaks and It's Working or something like that.
Yesterday, I came on a bus station Someone's Missing too early x) .. and then waited for my friend for Congratulations and half of The Handshake.
does it ever happen to you?