This is the 10897th most frequent Russian word.
выпрыгнув
"Having jumped out."
The word "выпрыгнув" is used here as a gerund indicating the action of jumping out.
Выпрыгнув из окна, он быстро побежал к дому напротив.
Jumping out of the window, he quickly ran to the house opposite.
The word "выпрыгнув" is employed as a gerund to describe the manner in which she saved herself.
Она спаслась, выпрыгнув из горящего здания.
She was saved by jumping out of the burning building.
The word "выпрыгнув" is used to express the action preceding the boy's feeling of coolness.