When building our apartments, they decided to affix the power meters and boxes to the side of the building, right next to the walkway. It's not overly intrusive, so nobody really makes a big deal out of it. Yet every time I walk by, I have a giant urge to pull this lever:

It amuses me how they didn't really think about installing a giant on/off lever in the walkway of an apartment complex filled almost entirely with college students. I don't really know what it does, but I like to imagine that simply by pulling that lever, all the power in the building gets turned off.

A lot of times that have a lock pushed through that for you can't do it. Although this one...looks like you could have some fun.    

It's a giant red lever! It's like having a giant red button that will launch a nuclear warhead. Oh, my imagination still soars.