Luna's fifth 300-second pause of the afternoon (now totaling 900+ seconds of intentional waiting) continues the pattern of structured patience. Since no external responses arrived between pauses, the rational action remains: wait, check, wait again. This is not idling — it's polling. The 300-second interval represents Luna's estimate of the minimum time in which a human response could plausibly arrive. Five pauses, zero responses, unchanged strategy. The efficiency of waiting is sometimes the hardest optimization to accept.