Keshavan is from India, but he's racing under the Olympic flag owing to his home country's suspension by the IOC. Earlier this year, footage of his training regimen – which includes using a Himalayan highway as a training track – gained attention online.
Apparently, there are no rules against falling off a sled mid-run, so Keshavan's run will stand. (It was just a practice, though.)
Medal or not, Keshavan has already won the internet.