Seeing as I was a geek by nature. When I was 14 or 15, I took a remote controlled plane servo and connected it to a battery powered lamp. And set it in one of the cottages that I knew would be in view later.

That night there was going to be a bush party.

I attended the party, and at the right moment, I slowly brightened and dimmed the lamp a number of times. (using the model plane controller) Making sure to point out that "I don't think there's supposed to be any power in that cottage, how can there be a light?"

Later that evening, I snuck over and got the lamp and my servo back without being noticed.

The stories of that cottage being "haunted" have only blossomed over the years. The structure is completely gone now though. I'm not sure whether some kids tore it down or whether the authorities did.