Taking parts in Events from PC like a PC network game

This is just an idea for consideration.

Imagine if one user takes part in the Event sitting in the front of computer. Other players would participate in the Event “in real” running with smart phones and their position determined by GPS. The one sitting in front of computer, who registered before could play on keyboard. To make situation somehow comparable – the one playing on computer would have speed limit to e.g. 9 km/h. However he could run through area where real running is not possible like river or buildings.