change state,
turn undergo a transformation or a change of position or action; "We turned from Socialism to Capitalism"; "The people turned against the President when he stole the election"
faint,
swoon,
pass out,
conk pass out from weakness, physical or emotional distress due to a loss of blood supply to the brain
zonk out -
fall asleep fast, as when one is extremely tired; "after the long drive, we zonked out and slept for 10 hours"