What are some macroscopic examples where a group of stable things change to match a differently configured stable thing introduced into their midst?

Maybe a stampede, where creatures were stationary until one bolts and then the ones around it start running too?

Or a standing ovation, where people standing in front block the vision of those behind who stand up too until everyone is in their feet?

Or dominos arranged upright in a line and then one is placed lying against a neighboring upright domino?