What happened
Written from the data, not opinion.
Options positioning puts the call wall at 82,000 and the put wall at 81,000. Dealers are estimated to be long gamma, where dealer hedging tends to dampen moves.
At 00:49 UTC a 71 BTC bid wall at 80,502 was pulled before price reached it.
At 01:18 UTC a 84 BTC ask wall at 80,810 was eaten by market orders.