Okay, I'll turn this to a sailing application...

When our local sailing club hosted my mono's nationals a few years ago, we had the weigh-in scale on a club hoist, with the digital display on a table nearby. I walked up and set my cell phone next to the display, and that boat suddenly was swinging between 1 lb and 10,000 lbs! Unfortunately, it took quite awhile before the scale would read accurately again!

So if you're a bit light at the next regatta, walk around the measuring area with your cell phone till you get the reading you want!