That is the world fish live in. You bet you would. You might even be on the lookout for it to happen. Enough times and your mouth would start to water whenever you saw it happen. That s fact.
Fish look for things to appear on the surface for the same reason.
It, if the patterns are the right ones, means food is coming their way. I have photographs of fish when a fly is placed ahead of them so only the dimples of the flies feet would make impressions on the surface, showing the fish open it s mouth, move it s tail and start raising it s head. The right stimulus at the right place produces an automatic response. Back to the mirror held over your head. If you could remove a circular portion of the backing you would have a hole you could see up through.