you'll spoil it like that...

Honestly, I googled for half an hour - there is no official information...
There are many versions, very different...
Here are the main ones -

First and official. The bear took off from the Luzhniki Stadium with the help of balloons and helium, which he himself was pumped up with while being rubber, and landed 15 minutes later on Vorobyovy Gory. All. How he could do this is not explained. It’s so “simple” to take off and land at the planned location. It must be said that this version is very truthful, with the exception of the important details of controlling Mishka, the flight itself and the flight time. The question just arises, how did Potapych manage to do everything so smoothly himself? After all, the robotics of those times were hardly capable of such maneuvers with such a large and complex aircraft, which was called the Olympic Bear balloon. Well, at that time there was no such device that you could control it from a remote control on the ground, or rather, there was no time for such serious work, and it was necessary to make do with a simpler option than remote control.

Second version. The bear was controlled by a pilot, a test pilot, who was located in his right leg and controlled it with the help of balls. Up to the waist it was ballast, then there was helium in a rubber shell, plus the balls themselves which the pilot manipulated. The balls were divided into two equal groups, the control principle was that the pilot pulled that group of balls in the direction where he needed to turn. Everything seems logical. One can imagine that by “waddling” with the help of groups of balls from side to side (just by analogy with the gait of a bear), the Bear could be brought to the landing point, and then, having released the helium, sit down. The version is beautiful, but its authors did not take into account the fact that there is such an atmospheric phenomenon as wind, which could blow in a different direction, and given the high windage of the product, no amount of manipulation of the balls would force Mishkin to change course back to the wind. Do you believe that Soviet scientists and designers who worked on the project would not have taken into account such a factor as wind?! Soviet scientists, not Papua New Guinea scientists, those who sent autonomous modules to the moon, were the first to go into space, etc.

According to the third version he fell in an unknown location in Moscow, knocking down a beer stall (!) and two citizens. According to this version, it turns out that he could have attacked the Kremlin and the Kurchaty Institute, for example, or simply hit the windows of some residential building, delighting citizens who had not moved away from the sentimental ceremony of farewell and closing of the Olympic Games on TV. So to say: - Hello, here I am, Mikhail Potapych Toptygin - Olympic, in person, the same goofball I look like, flesh and blood, my dear, uncontrollable Russian bear!

Version four the most fantastic and no less beautiful. Misha flew all the way to the Mozhaisk reservoir, also controlled by a pilot. The pilot seemed to be unable to cope with the landing and, due to strong winds, flew away from Moscow a hundred kilometers (!), where he undertook landing maneuvers to bleed off the helium, but gusts of wind strongly knocked him to the ground. The pilot died. Imagine the posthumous order of the Hero of the Soviet Union, to a test pilot who died on a secret mission while piloting the Olympic Bear! And it happened on the territory of the Vympel camp site. The version that he was shot down by valiant air defense somewhere in the Moscow region, I think, is not worth considering. Although who the hell is not joking, if they missed the German pilot Rust (who landed on a sports airplane on Red Square) in the future, why in the past would such a serious structure as the air defense near Moscow not bother to mistake Mishka for an enemy bomber...