• to frustrate sy, to throw sy off sy's balance
• to disorient, to disorientate
• disconcerted, out of joint
• to addle, to boggle, to fluster, to get flurried, to go queer, to lose face, to lose one's bearings
• bewilderment, boggle, disorientation
• baffled, befuddled, confused, distraught, mixed, perplexed, pixy-led, unbalanced, unhinged
• inhinged mind, mind off it's balance, unhinged mind