If your are running a thread and get interrupted, do not try to get back on track and finish up the thread. Cut that thread and begin a new one.
Returning to the original thread appears try-hard, though you can get back to it later as the convo dictates. This is called snip-and-stack.
Handling the external interrupt by Mystery:
Step 1. Say to the target (assuming she?s the most attractive of the set), ?introduce me to your friend. It?s the polite thing to do. You can dress her up but you can?t take her anywhere? (directed at target). Nobody wants to appear socially inept, so this phrasing forces the outcome.
Step 2. Introduce yourself to the interrupt even without an introduction. Shake hands.
Step 3. Stack into new routine.