(TMZ) - Skrillex took a break from celebrating after the AMAs Sunday night ... and got very serious and emotional about the woman who went overboard during the Mad Decent Boat Party when he stopped to talk to TMZ.

Skrillex was one of the headliners on the recent EDM cruise that had to return to port following the tragedy. Parts of the excursion were cancelled, and several performances were postponed.

As TMZ reported ... many of the 3,000 fans who were onboard are pissed their trip was cut short -- and Skrillex addresses their concerns -- but the real takeaway is ... he's still torn up about the whole situation.

He says, "It's something none of us ever forsaw [sic], or would've ever wanted to be a part of. And it affected all of us so much. It's not something that we want to be sensationalized, and the reason why I'm talking to you [TMZ] is because no one has ever answered this question before."