Task: Categorize the tweet based on the intensity of the specified emotion E, capturing the tweeter's mental state. 0: no E can be inferred. 1: low amount of E can be inferred. 2: moderate amount of E can be inferred. 3: high amount of E can be inferred.
Tweet: I need to study up on celebrities' birthdays bc my heart almost stopped when I saw Harrison Ford trending... 😯 #relieved
Emotion: joy
Intensity class: 
0: no joy can be inferred