HairyMary wrote: my max speed and it was 99.99km/h!!!!! ...
how the hell would my max have, well, maxed out like that?
There's been a few other posts with overhead high voltage wires and train stations (again with the big chunky wires with electricity running through them) causing some wireless devices - HRMs, spedos etc, to produce erroneous readings.
Either that, or it was a huge gust of wind on an extremely steep downhill.