After getting out of the snare trap, Darien tells Selma to go on Voice Mode, but this is problematic as he is still making his way through the booby-trapped land and Selma told him that in order to detect the traps, she needs to be on Scan Mode.
Darien tells Selma he needs to get as far away from the island as he can to detonate the blast, yet in the next scene he is only a few hundred feet from the house (still on the small marsh island) when he tells Selma to detonate.