The context of the following conversation is Bailey spent all day putting together a domino play set. When he was done, Bailey let every domino fall.:
Bailey says That domino play set took me all day to set up..
The friend responds How many hours did it take you?.
Bailey responds I started in the morning and didn't finish until eight PM..
The friend responds Wow, that's a long time. What did you do when you were done?.
Bailey responds I knocked over one domino and watched the rest of them fall..
The friend responds That must've been pretty cool to watch..