Inducing cats to exercise with a beam of invisible light

In his blog, Alex Pang points on this incredible patent:

US5443036: Method of exercising a cat:

Abstract: A method for inducing cats to exercise consists of directing a beam of invisible light produced by a hand-held laser apparatus onto the floor or wall or other opaque surface in the vicinity of the cat, then moving the laser so as to cause the bright pattern of light to move in an irregular way fascinating to cats, and to any other animal with a chase instinct.

Some more about it:
Carayan et al., "Effects of tianeptine on the Performance of a reaching movement in a cat", Psychopharmacology, vol. 104, Issue 3, Berlin, 1991, pp. 328-336. (9 pages) [ISI abstract]
Levesque et al., "Visual `cortical-recipient` and tectal-recepient pontine zones play distinct roles in cat visuomotor performance", Behavioral Brain Research, vol. 39, Netherlands, 1990, pp. 157-166. (10 pages