yeah thats it they sometimes just swim around a tight line without spooking. by making it so obvious it might just work!? i have seen a carp spook after picking up a stick whilst feeding, that was with no rig in the water. make what you will out of that. i cant say for sure if they can tell the difference between the two, but i think they will be cagey of anything they accidently pick up off the bottom whilst feeding. ill try and get down to a lake soon thats not a runs water, but not hard. ill report back with results asap.