What is the fine-grained topic of the following text: He blew our minds at Nachtdigital festival last summer and we couldn’t but bring him back to Prague the next day, where on a Monday night he provided the vast crowd at Stalin with a self-possessed, monk-like performance of extraterrestrial Techno hypnosis, setting the bar for his return pretty high. Only return the topic.
A techno music performance at Stalin in Prague