to lose one's presence of mind; be flummoxed; to get flustered
to lose sight of; to miss
to become speechless; to be at a loss for words
to lose consciousness; to faint; to black out
to lose one's way; to be at a loss
to lose one's mind; to go crazy; to lose one's senses; to lose consciousness
to turn pale; to lose color; to lose colour
to lose one's presence of mind; be flummoxed; to get flustered
to lose face; to disgrace oneself
to lose a seat (in an election)
to lose one's composure; to lose one's temper