Flameangel
2500 Posts Club!
Are you going to try a carrot ? my concern is don't want to damage the power mechanism of the window whilst seeing if it " guillotines " the carrot.Lol well I would assume a finger of even a child with bones would have more density than a tiny stick of celery. My guess would be that a carrot is a better mesuring device for this test since it's a lot denser than celery.
I was thinking maybe a small stuffed toy ? or worse, shatters the glass in the window.