[aubreykilian]

I used to work as a Network Admin at a big university in Cape Town years back, and one of the urban legends at the time (late '90s) was that one of the long distance wireless (microwave? Line of sight required) network links were reported to drop every day at the exact same time for a a few minutes only. Lots of hours of troubleshooting hardware etc. later, and still no solution. Eventually a site-visit was done at both sides of the link, binoculars entow. The problem? The line of sight was going dangerously close to the top of a hill where a farmer had led his cattle every day at the same time. The cattle blocked the line of sight for 5 minutes every day. No idea if this is true though.