Blasted!
Confound it!
Slipped away!
Vanished!
Curses!
Blast!
Hoodwinked!
Befuddled!
Drat!
Foiled!
Outsmarted!
Flummoxed!
Bah!
Outwitted!
Confounded!
Bamboozled!
Thwarted!
Vexing!
Fiddlesticks!
Dagnabbit!
