Wow, that's impressive. I watched a lesser one with a channel with a few thousand people. When they passed the link, I clicked it just to see the price changes. Surprisingly, they were just trying to buy cheaper and cheaper to get into the pump, so the only thing they did was raise the volume and lower the prices. I think they killed the coin in the process, lol.
But I've never seen such a scary one as the one you mention. I imagine the group leaders were super happy with that result. Rich in no time, sell to your followers, leave the party, create a new one with the sad remnants who think they just did it wrong this time.