The Great Gatsby, to snap out a candle

Hello! Could you, please, explain me the meaning of snapped out in this extract of The Great Gatsby, chapter I:

“Why candles?” objected Daisy frowning. She snapped them out with her fingers. “In two weeks it'll be the longest day in the year.” She looked at us all radiantly. “Do you always watch for the longest day of the year and then miss it? I always watch for the longest day in the year and then miss it.”

Does it mean that she actually snap her fingers immediately adjacent to the candle flame ant that the sudden tiny puff blows it out or, more vaguely, that she frees the candle from the snuff by pinching or cutting this off?

Thank you