September 25: SECOND PERSON AND VISUALS FAST TRAIN TO PARIS ACCOUNT POEM RIDDLE

While sewing up your backpack zipper 
which broke in the last ten minutes before leaving the house in Antibes, 
you go out into the carriage intermittently and gaze wistfully out the window at the sea

crying blurry projectile tears, of course

eventually you stop weeping inside but next time 
there is a road spoiling the view of
well, the whole world really

even when you look back for the last time, not knowing it is the last time

you wish you are on that beach anyway but
you've got to appear somewhere
tonight

so you finish sewing up half your bag opening with your wickedly curved book-making needle and hefty thread,
reattach your packed-for-an-emergency large safety pins to the rest of the gap
securing your underwear from spilling onto a Paris street
and return to your seat

making do with the beginnings of autumn

and a little excitement at French wildlife

you do not photograph the four nuclear station cooling stacks

but you do snap another passing fast train

which thrillingly sucks your train in towards itself at an extremely high speed
and you wonder, as your ears pop, exactly how fast you are going

it is a miracle of modern engineering
and in eleven seconds of video 
a good question for 
calculation
geeks

answers in the comments below