“The next thing I know, I'm sprawled out on the floor.”

You're at a party. You're telling a funny story about a time when you tripped on your son's toy car. You've described what you were doing before you tripped on the toy, and how you tripped on it. Now you say:
The next thing I know, I'm sprawled out on the floor.
accident,
laying,
past,
storytelling,
time 

