• mind of extraordinary range
• inhinged mind, unhinged mind
• inhinged mind, mind off it's balance, unhinged mind
• mind intent on a problem
• to be off, to beetle off, to chase oneself, to check out, to get by, to get off, to go away, to go off, to go past, to go, went, gone, to jog, to leave for, to leave, left, to march off, to nick off, to part, to pass, to piss off, to pull out, to push off, to quit, to quit, quit, to resort, to resort to, to sheer off, to shove off, to slope off, to sod off, to take off, to take one's departure, to turkey off, to turn away
• off one's head, off one's nut, out of one's head, to be out of one's wits