Beer can chicken
I first heard of this crazy method of grilling a chicken about 12 years ago. It sounded funny and looked even funnier. You shove a beer can up the cavity of a chicken, stand it up on the grill grates and let it cook standing up at attention.
The technique is actually pretty ingenious. Standing it up promotes even cooking and browning while the steam created by the evaporating beer keeps the meat juicy and helps cook a bit faster. If you add aromatics, such as garlic, herbs, citrus to the beer, it will also impart some flavor. I have no idea where this technique originated but kudos to the person that came up with this.