Pabladdiumism
When you start talking and then your brain decides to take a nap in the middle of your sentence.
He said 'I was going to the store and then I saw a' and then just stopped like he forgot he was talking.
She began 'I think I'm going to eat pizza and then' and then just stared at the ceiling like she was done.
He started 'My dog is so annoying because he barks at' and then just left the room.