Here's an interesting idea. If you're out of cell phone range and can't call in your rescue after getting lost hiking in Tuolumne Meadows, you should probably carry the Rescue Balloon. While only a concept, the idea is solid. Even if it doesn't exist yet, there's nothing stopping you from taking a couple helium balloons on your next hike just in case you get lost. Those cool silver kind with Batman or Hanna Montana on it. If you get lost, just let them out with some fishing line and, bam, instant rescue. But seriously, if they can get the weight down, not a bad idea to be able to send up a balloon if you're lost. Check it out.