Bonus Fry

(Noun) An additional, and unseen, french fry or fries found at the bottom of a bag in a fast food restaurant providing extra nutrition when the meal was believed to have been finished. (Originator: Jim Gaffigan). Also used to describe freshly discovered food which had previously been hidden, forgotten or unseen when searching for ways to ease a need for a snack .

1 - After finishing the meal I was still hungry, but then I spotted a few hidden fries in the bag. I had discovered 'bonus fries'.
2 - I was so hungry after lunch, and was searching my bag when I uncovered a chocolate bar I had forgotten from the day before. The universe had rewarded me with a 'bonus fry'

Happclap

Clapping with surprised excitement and glee at an event or occurrence

When the band finished they were so good I couldn't resist giving up a happclap