Oooooh, I like that idea! Unfortunately I only have one of those brown bristle mats (plus 2 bristle wands that are much smaller), if you're referring to what I think you're referring to. But even just tossing it in a place that makes it deviously more difficult couldn't hurt. Well, not me anyway. As for the sub, as long as he avoids it, couldn't hurt him either. *grin* I do, however, have a lot more of the spiked mats, meaning the upside down office chair mats, that I could scatter around the floor. How about layering those all around the floor like a minefield, with more mines than space without mines? Or do you think that would be TOO harsh? (And you may have noticed that I placed at least one or two of the washers right around one of the spikes on a spiked mat, so he had to go a bit into the mat to retrieve it. You can see that in one of the pics in this post.)  ;-)