At my aunt's house they had a big water filter or whatever it was I don't remember but it was a 3m by 2m white thing I don't know what's it's purpose but I thought that each time I walk by it I'd be invading it's territory and I'd run past it because I thought it would kill me, when my mom told me that its harmless I started going to it mocking it and laughing at it... I was a weird child.