It was the annual Ball of the Lords and Diavolo was in full conversation with one of the lords before Lucifer walked by. The poor demon seemed a little tipsy and tripped, spilling his drink over him and landing in Diavolo's arms. The Demon Prince was stunned, especially since Lucifer wasn't immediately concerned unlike usual.

"Haha! A little tipsy, Lucifer?" He chuckles jovially. He was taking this all light-heartedly, not minding at all.