Given a paragraph about movies, and a set of conversational question answers about the paragraph, generate a relevant question to the topic of the paragraph. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`.

CONTEXT: Leverage. Xavier's seizures cause everyone to be paralyzed. Logan's healing factor allows him some movement, but the closer he moves to Xavier the stronger the effect by Xavier is. By stabbing the walls, he uses them to climb towards an increasingly difficult to reach Xavier. It provides a hand hold he can push against, like rock climbing or climbing a rope.  <sep>  Q: Why does Logan stab walls? A: By stabbing the walls, he uses them to climb towards an increasingly difficult to reach Xavier 
Where was Xavier?