Sam Smith recently appeared on The Graham Norton show, during which he talked about the processes he had to go through to record his theme to the new James Bond filmSpectre. In the interview Smith talked about the uncertainty upon receiving the call to record the theme, all the way up to the unique way in which he reached the vocal register he uses on the song. Norton noted that Smith had yet to play it live at this point, and it would appear he has a pretty valid reason for fearing its live debut.

“I’ve only sang the song once really,” he mentions, adding, “I did the demo in the studio, and they used it.” Having previously spoke about how quickly he wrote the song, this isn’t particularly surprising news, but the next part of what he says is: “It’s horrible to sing. Horrible. I almost regret— no, I don’t regret it… It’s just so high. I have to grab my balls, it’s awful.” So there you have it—the secret to singing as well as Sam Smith.

Watch the interview in full above, and watch the video for “Writing’s On The Wall” below.