I was talking to one of my classmates/colleagues/friends last week and he told me he always gets the best ideas in the bus, while traveling.
I mean - I plan to read the stuff I'm going to have a test from, I'm reading fanfictions on my mobile, books I took with me, papers and magazines I picked up from the mailbox...for like...five minutes.
Then people shows up. Colours. Sounds. Stuff. Traffic passing.