Have to say, this has been an enlightening thread for me. The mystery is now over and is not as exciting or scary as I had feared/hoped, and was indeed guessed by someone on here.
It was infact a spikey rubber ball that is used in a tumble dryer to help the drying process. A process stated and completed while I was at work by my other half (who was absent last night). I do not have pics because I had to leave ASAP, and I could have lied, but didn't want to anger the angry anymore than I already have.
But I would like to thank you all, some of the posts in this thread where genuinely helpful, and the rest where largely hilarious. This was never suppose to be a troll thread but it kind of ended that way, which is kinda reassuring.