Surprise dream of being surprised may reflect feelings of having miscalculated or incorrectly estimated a situation. Unexpected situations. Unexpected criticism or problems. Sudden life changing situations.
Negatively, dreaming about a surprise may reflect your tendency to subjectively overlook or underestimate situations in your life. Too much confidence. Feelings about embarrassing oversights.
A woman dreamed of being surprised by a snake. In waking life she experienced unexpected criticism at work.