Are the voices in my head bothering you?

A while ago I was helping my sister and brother-in-law with a project that they were busy with. We were taking a short break when my nephew came and sat at the computer on the dining room table where I'd been sitting and started to play a computer game.

After a short time, he started to moan about how the voices were irritating him. My sister and I looked at each other; We didn't hear any voices, the game's sound was off. We ignored the comment and carried on chatting.

After a while, my nephew got very agitated and started whining that the voices were really annoying him and that he just wished that they would stop talking.

My sister and I exchanged worried glances. There were no voices or noises from the game at all! Was there some strange dormant condition that this poor child was suffering from that had chosen to manifest itself now starting with delusions?

"Andy, are the voices telling you to do things?" I asked. This irritated him a lot "No!" he yelled at me, "It's not like that! They're just voices."

"Ands, what are they saying? Whose voices are they?" my sister asked.
"I don't know what they're saying! I don't know whose voices they are but they're irritating me!" He replied almost in tears.

We were getting more and more worried until we noticed that he had the ear phones draped around his neck and there was a very feint sound coming from them! The voices were the voices of Spongebob and Squidward from the game he was playing.

Later on, when we were having a late supper, I sat down at the table and was about to put my plate down when I heard creepy sounds coming from the table (which was shrouded in papers and books and homework) and, being rather anti-insects, I freaked out. I ran back into the kitchen yelling "There's a creature on the table, it's making a really gross sounding walk-ey noise!"

My sister went to the table and carefully lifted papers and books and homework and found nothing. I came back to the table and once again, as I was about to put my plate down, there it made it's creepy-crawl-ey noises again!

Once again, I yelled and ran for it and she came to have a look. This time, she very carefully lifted the table cloth and there it was...the earphones lying under the table cloth, the Spongebob game still on.

O.k, the computer monitor was facing away from me and I thought he had stopped the game but I felt like a real chop.