From time to time I participated in John Thompson videos as he shoot them in Munich. Munich is not far from Prague, I used to know Czech girl (she was not in Czech Gangbangs), but also a guy who was in some of the Czech Gangbangs, e.g. 10 and 11. Things are not so different between Germany and Czech, however, the Czechs seem to be a bit rougher in 10 and 11 (also in 5), but not in their last movies.
It is not a problem to get into such movies if you are not extremely ugly or overweighted or to old. Actually the studios are looking for guys. Your pubic hair should be shaved or trimmed, that’s a requirement. Also a medical certificate, not older than 2 weeks. You have to disclose your identity and they put them in their records. Alcohol, to my surprise, seems to be not forbidden in Czech (difficult to believe).
The film crew checks the requirements before shooting and if you fulfill the requirements you are in. The girl has nothing to do with it. Her choice is the gangbang. Of course she informs the film crew of her personal no-goes (no anal, no dp, no rimjob, sometimes only as “maybe”, depending on her mood at that day). The no-goes in a gangbang are of course limited. It is the idea of a gangbang that nearly everything is possible and you choose film 10 and 11 because nearly everything was possible. I think the girl in 10 rejected anal and dp. But that is not sure, because a dp is not easy for amateurs, especially in front of the camera.
On the set you have to perform and if you perform you will only get praise from the crew. The director is only interested in hard dicks.
It is true that film 10 and 11 look very genuine, not posed. It is like documentary film and probably it was. That is different to the later movies in this series. It is a big problem if they stop the action to often because you have to stay hard. In 10 you do not see the grabing at the beginning. You hardly see the girl. The cameraman was pushed back by the horny guys. That’s why I mean it was a real gangbang.