Staring often occurs accidentally, when someone appears to be staring into space they may well be lost in thought, or stupefied, or simply unable to see.
en.wikipedia.org This minute, every heady swill he takes of power, becomes a fog that muddles his morals, leaving him stupefied.
thenationonlineng.net Played on, dazed, unsteady, confused, moody, fatigued, stupefied.
www.stuff.co.nz Sometimes, during oral arguments, she would go on tangents involving detailed questions about the facts of cases that would leave her colleagues stupefied, sinking into their chairs.
en.wikipedia.org