Sounds like a form of hyper focus. Your attention gets lost within the details of the object and your mind switches off from everything else around you.
I've done it myself. I even convinced myself at one point that if I focused on the object hard enough, i'd be able to shift it with my mind...... needless to say, the object didn't go anywhere.
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Prof-Diagnosed: Aspergers Syndrome (I still call it that!), Dyspraxia, Dysgraphia
Self-diagnosed: ADHD-PI, Social Anxiety, Depression
Treatment: 5-HTP, Ginkgo Biloba, Omega-3, Pro-Biotics, Multi Vitamin, Magnesium