"Getting Ethan" is an orchestral piece on the Season 1 soundtrack. It plays when the survivors ambush Ethan.
The first four notes play faintly in "Namaste", just as Juliet discovers that the baby she is holding is Ethan.
The survivors' trap appears a success: Ethan has started chasing Claire. Jack tackles him but loses his gun in the process. Ethan and Jack wrestle till Jack gains the upper hand and Sayid, Sawyer and Locke approach, armed. Locke comforts Claire, and Jack keeps punching Ethan, for fun.
They have captured Ethan at gunpoint, but before they can question him, Charlie shoots him six times with the gun Jack dropped.