Short stories have no net. The writer cannot take a leisurely sixty pages to get things moving, or make a side trip onto a barely related subject, or slack off in the last forty pages. Everything is right now, right here, in the reader's grasp and mind's eye. The writer has twenty to thirty pages to entice, seduce, enter, and alter the reader.
I started playing violin in the 5th grade. They had a program in school where you could get out of class to go play instruments. So I raised my hand, left out of class, me and a bunch of my homeboys, just to get out of class for that day. They asked what instrument you wanted to play and I picked the violin.