What does Judges 16:20 mean?

Then she called out, 'Samson, the Philistines are here!' He woke up and thought, 'I’ll get free like before and shake myself loose.' But he didn’t realize that God’s power had left him. Judges 16:20 - Modern Text Bible

(Samson tries to escape as he always has, but this time he’s powerless—God’s presence and strength are gone because he broke his vow.)