The runner lost the race because he had bad shoelaces. What might his shoelaces have caused him to do?
Options:
- gain ground
- near finish line
- win the race
- get tired
- trip over
Let's think now! Step-by-step reasoning:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Shoelace may cause someone to trip over. Runners might trip if they have bad shoelaces.
So, the final answer is trip over.