Phat

Fair enough--although we have hiked about 500 miles together in the last two years, and have a pretty standard policy: '
We stick to the trail and we stay more or less within sight of each other.

And I would argue that in each case the whistle worked--In the first case we lost sight of each other; but we were paying attention, which is how we noticed it, and the whistle reconnected us.

And in the second case...hey, when my wife whistles, I come runnning!