Yeah, it was a TGV Atlantique set (normally runs from Paris down the Atlantic coast side of France through Bordeaux towards Spain); but shortened to the two power units and I think three passenger cars (although empty as these were dedicated speed-record attempts). They managed about 520 (and change) miles per hour. No, I'm not a proper Railway geek, it's just people in our family have worked at GEC-Alstom and helped making bits for them!
Slug's right too... No track on the train in the video; magnetic levitation in linear format. Three pairs of magnets in use (on the underside and left/right of the train, with facing-sets on the pathway), activated in sequence with opposing magnetic poles to those on the train to produce levitation and forward motion without mechanical-adhesion; so leaves shouldn't be a problem (unless in ENORMOUS quantities); BUT... What happens when an artic delivering iron-filings sheds its load? /ubbthreads/images/graemlins/grin.gif
Regards,
Rob.