In 2003, a swarm of young bats invested the studio I had for my residency in Mönchengladbach. They would come every night from 23h to 3h in the morning. I accomodated and tried to co-exist with them. Finally I decided to make a conference to my returning visitors about hosting, empathy, friendship and collegiality. As I speak their language, the soundtrack of the video consists only of high frequency squeeks, fluttering of the wings and my own gesturing.