Hello Misha! It would depend on the context of the sentence and what the situation is, but "out there" means wherever he was doing his action or performance. If it was someone performing then "out there" would mean on the stage; or if it was a sportsman playing his sport then "out there" would be the sport's field or pitch where he was playing his sport. I hope that helps!.

"Out there" in this scenario would refer to perhaps an activity you do prior to telling the story. For example, let's say you were a surfer, and you came back in and said, "I made plenty of mistakes out there....", we would know what you meant. Let's say you were a trapeze artist and had a show. We would know what you meant. So, the "out there," if you were to use it, implies that the listener knows what activity you had just been doing.