Oops... guys, the friend is now looking out the windows! And since the windowside inside is usually at the level of the belt, and on the outside - at the height of human height, then to find out that people at home walk in one shirt, can only a very persistent observer.
(There is, of course, a chance that the houses are in the low, and the path along them is in the high, but this only aggravates the situation of the companion.)
P.S I wonder how much he plays?