A little Friday fun: The long answer to what would happen if everyone on the planet jumped at the same time. XKCD has a special take and chooses Rhode Island as the location:
A cell phone comes out of a pocket. Within seconds, the rest of the world’s five billion phones follow. All of them—even those compatible with the region’s towers—are displaying some version of “NO SIGNAL”. The cell networks have all collapsed under the unprecedented load.
Outside Rhode Island, abandoned machinery begins grinding to a halt.
I’ll let you read the rest.