Before I begin, foul language is hard to avoid for my experience because it is essential to the actual dialog, I have abbreviated words that are not allowed. I have only experienced what I believe to be a ghost only once when I was 12 years old. My old house had a finished basement which my brother (10) and I used as our play room.
Foul language was very discouraged in my house so my brother and I would cuss as much as possible when my parents were not around, cussing at the TV was normal for us (we were weird kids).
One night while playing and watching TV in the basement with my brother, a toothpaste commercial came on. I cannot remember the brand of toothpaste, but I do remember everything else. The woman was talking about how the toothpaste was good for her family's dental hygiene and how it was changing their lives. My brother burst out "F*ck your family b*tch!" I started to laugh but the woman on TV looked straight at him and said "Excuse me?!". At this point we still thought that something might be happening with the plot of the commercial that would make her say that and I chimed in "Your an ugly w*hre" to make my brother laugh, but to my horror the woman then turned and glared at me and sternly asked where our mother was.
Now, I would like to say that we had a come-back, but honestly we both just froze and stared at the television. The woman looked down and began to cry, holding her hand over her mouth and glancing at us, she suddenly looked like a worn out, beaten woman and the shiny, commercial lighting was gone, for lack of a better way of explaining it, she looked 'real'.
This all happened within about 30 seconds, then the commercial ended. I remember my brother cried afterwards and I told him to settle down, we were glued to the TV for hours after to see if the same commercial would come on again and this time we wouldn't say anything to see if it was just a coincidence, but it never came back on.
I'm not saying it was a ghost, it could have been a coincidence, but I know I never saw that commercial again and my brother and I both vividly remember it and bring it up often. Thanks for the chance to share my story.