People are like radios and broadcast their thoughts, and you'll be picking them up without knowing it. You'll also be able to project them i.e influence people. Those powers known as 'siddhis' are just a fraction of what you can attain.
Much like everything western though guided meditation is a horribly bastardised version of the real thing, if you're interested look into Raja Yoga when you're ready.
Edited: http://www.yogebooks.com/english/atkinson/1906-09rajayoga.pd...
This is the definitive course guide, the first lesson can take a year, 10 years, or a lifetime, don't go past the first lesson till you're ready. You'll know when you are.