Surprisingly, the hand off points are kept fairly quiet, until the new runner is in place. Most of the crowd at this point is family and friends of the runner. I made an educated guess at the 300 meter leg of the run, and positioned myself about 100 feet further up, to take advantage of the security pushing people back, right at the switch. I knew the long lens would be just about right from that distance, for a clear shot.
I live in my own little world. It's OK, everyone here knows me.