In this task, you're given a context passage. Your job is to generate relevant questions that can be answered by directly referring to the passage.
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Question: Austin challenged Remy to a game of tennis at the city park on Saturday.

Answer: How would Remy feel as a result?


Question: Kendall ordered flowers from Robin's flower shop across town.

Answer: Why did Robin do this?


Question: Mohinder gasped softly as he watched the serum disappear from the tube and into his veins . It felt strange for a few moments after ... tingly . Mohinder wondered how he'd test it , then he thought that he could at least take a sample of his own blood to see if anything had changed within . Quickly , he rushed back inside but in his excitement to see the results of his experiment -- he tripped and his body started to head straight for the tall glass window .

Answer:
What may have caused Mohinder to trip ?