So this is a minor nitpick, but it's been bugging me for a little while now.
In The Fellowship of the Ring, we can see that Gandalf is a casual pipe smoker; he seems quite adept at it, even able to create a ship with his smoke. Even Saruman calls him out on his "love for the halflings' leaf", so we can imagine that Gandalf is used to smoking.
However, when we see him smoking at Minas Tirith, he has a coughing fit with the first or second puff, and he seems to be showing some discomfort.
Why is that? Were any explanation given (in or out-of-universe) to why Gandalf coughs at this point?