This is the 5817th most frequent Japanese word.
ぱっと
Suddenly; quickly; effortlessly; with a burst or flash.
ぱっと here conveys a sudden, quick action, describing the way the standing up was done.
彼はぱっと立ち上がって窓を開けた。
He swiftly stood up and opened the window.
ぱっと in this sentence represents a sudden or instantaneous recollection or realization.
懐かしい写真を見て、彼の記憶がぱっと蘇った。
Upon seeing the nostalgic photo, his memories suddenly came flooding back.
ぱっと illustrates an immediate and striking occurrence, emphasizing the sudden appearance of the fireworks.