Just watched it. After the first stage entry burn something is not right. The booster looks like its either 'sliding' from right to left or one of the engines has gimballed way over to the right. Either way, telemetry is lost soon after, either SpaceX cut it off or the booster was out of control. and they lost the signal. The seagulls on the landing pad didn't look too bothered so i don't think the crash into the sea was very close. Shame, that would have been the 25th consecutive landing and the 70th overall.