need to get better

6 months ago, when my science practicals were going on, i visualised in my mind 'the examiner will only ask questions from surface chemistry' and 'physics examiner will ask only about semiconductors'.

I visualised these 2 scenes 10 hours before the practicals. The future went smoothly and I was asked about semiconductors and surface chemistry only among 30 chapters.

Please tell me is it a psychic moment?? If yes, how can I improve myself?