I occasionally bring a sandwich to eat for lunch at work. The company has a small kitchen where I go to wash my hands, and then I generally eat at my desk. Whenever I have bread, I always try to wait for a time when nobody is in the kitchen who will try to talk to me, wash my hands, and then run quickly back to my desk and make hamotzi because I am worried that somebody will try to strike up a conversation with me after I have washed.
My question is twofold:
1) If somebody ever does talk to me after I have washed my hands, would it be considered an interruption for me to explain that I cannot talk between washing and eating some bread? If not, how much detail can I go into before it is considered an interruption? For example, if the person asks, "So how are you talking to tell me this?" can I go on to explain that as well?
2) What are some practical steps that can be taken to avoid falling into this awkward situation.
For the purposes of this question, assume that the company has enough employees and people walking around who might talk to you that it is impractical to warn all of them ahead of time.