So I got to thinking, how would certain action movies have ended differently if the protagonist were confused about the ceiling and the roof? For example:
Die Hard
John McClane to himself: I found those bombs on the roof earlier but now I can’t remember exactly where they were. Were they on the roof ... or the ceiling?
[John McClane has an internal argument for 45 minutes, bleeds out and dies. Hans Gruber’s plan to have the hostages blown up on the ROOF succeeds, he and his crew escape with hundreds of millions of dollars.