Dillon Danis and Logan Paul just got into a wild altercation at their prefight press conference Thursday ... one in which Danis actually hurled a microphone full speed at Paul's face.
The fracas happened just minutes ago as the two were on a stage trying to promote their Saturday boxing match ... when Paul chucked a bottle at his bitter rival as they were set to walk toward each other for a ceremonial staredown.
In response to being hit in the gut by the object ... Danis went nuclear -- and hurled a heavy microphone directly at his opponent.