Near the end of the interview, Fallon asked Lower if she would be willing to play the "Severance" theme song on the trumpet.

While appearing on "The Tonight Show", Britt Lower (Helena Eagan/Hellie R.) played the "Severance" intro theme song on trumpet.

Severance star Britt Lower has received an enthusiastic response from fans after playing the show’s theme tune on the trumpet. She appeared on last night’s (April 1) episode of The Tonight ...