Be bored, frightened, pissed, stoned, etc. out of your mind
Definition 1 of 2
Pro Tip 1/3Emotional Extremes
Use when experiencing emotions so intense they dominate your thoughts. 
This horror film had me frightened out of my mind!
Pro Tip 2/3Hyperbolic Expression
Often an exaggeration, not to be taken literally. 
I was bored out of my mind during that lecture.
Pro Tip 3/3Colloquial Usage
Most appropriate in casual conversations rather than formal settings. 
I'm pissed out of my mind with how they treated us!