Last night while going to sleep, I had an idea that was so intriguing I had to write it down. The idea is something that could be used as a fundraiser or awareness campaign. Essentially, you would send a wave across a country or region, purely by sight. People would stand in a massive line, and wave to the next person, who would wave to the next person, and so on.
This would be really hard for Canada, because we have more than 4000km coast-to-coast. However, if you assume that each person could see 100m, you would only need 40 000 people. Canada has 33 million people, so only slightly more than 1 person in every 100 000 would need to participate to make this a reality.
Contextually, it would be an excellent campaign for sight itself, or blindness awareness, but there are more important issues to promote.