Tralan was a Eurondan who volunteered to be sent through the Stargate of Euronda to Earth before they had managed to make contact. Though he did step through the Stargate on the Eurondan side, he was killed by being thrust against the Earth gate's iris, as there was no way for the Tau'ri to tell if the incoming traveler was a friend or foe. (SG1: "The Other Side")