For checking the transcript: https://www.buzzsprout.com/2379282
A bag of nerves
describes someone who is extremely anxious, nervous, or stressed, especially before an important event or in a tense situation.
Examples:
1- When Sam had to dance at his cousin’s wedding, he was a bag of nerves, moving like a robot with no batteries, terrified someone would post his "moves" on the internet.
2- Before her wedding to Prince Charles, Princess Diana was reportedly a bag of nerves, overwhelmed by the attention of millions around the world.