Just then
Definition 1 of 1
Pro Tip 1/3Immediacy
Emphasizes an action occurring directly after another, with no delay in between. 
She finished her speech, and just then, fireworks erupted.
Pro Tip 2/3Adds Drama
Often used in storytelling to create a sense of suddenness or surprise. 
Just then, a figure appeared in the doorway.
Pro Tip 3/3Transition
Serves as a narrative bridge, shifting the scene or introducing a new element. 
We were clueless about the noise, but just then, the cause became clear.