A mum who took a seemingly innocent snap of her daughter standing on a toilet has spoken of how she ‘broke down’ when she realised the true meaning behind it.Stacey Wehrman Feeley, from Michigan in the USA, shared the photo of her three-year-old to her Facebook page.She wrote: “I took this picture because initially I thought it was funny. I was going to send it to my husband to show what our mischievous little three-year-old was up to.”However, the moment she told me what she was doing I broke down.”She was practising for a lockdown drill at her preschool and what you should do if you are stuck in a bathroom.”Stacey had the heartbreaking realisation that her little girl was practising hiding from a gunman, should one enter her nursery.