Sayid trips security sensor, Jin and Radzinsky find him - Muppets in the Flame

Back at the Flame Station, Jin is looking at the monitors which is showing The Muppets on the top left screen. You can see Kermit the Frog in the second photo. Radzinksy tells Jin that the Looking Glass Station was the last one to check-in and they had nothing but an incoming sub. Shortly after he says this, a red light starts flashing accompanied by a beeping sound which indicates a security breach. Sayid tripped a sensor in grid 325. According to the monitor (photo 3), it was a pylon breach at pylon A84. Jin grabs his gun a runs off into the jungle. As he runs off, one of the numbers, 4, can be seen on a barrel (photo 7).

Jin finds Sayid running through some tall grass and yells at him to stop. Jin is surprised to see that it is Sayid and immediately asks where Sun is. Radzinsky shows up and Jin points his gun at Sayid and tells him to shut up and to get down on his knees. Sayid seems perplexed by this turn of events.

How exactly did Sayid trip the sensor at the pylon? Did he climb over it like in season 3 or did he go through it? This is a question that may not get answered.