 Certain concepts of stargate travel were phased out over the course  of the first season, such as the travelers feeling extremely cold  and arriving with frost on their faces. Also the concept of the  travelers unable to keep their balance and always tumbling out of  the stargate (unless, of course, they tumbled into the stargate to  begin with). This was explained within the show as a result of more  precise dialing of the Earth Stargate, and oftentimes these effects  are brought back when the wormhole is disturbed during transit.