i´ve had some similar experiences, me and my mate snuck into a cherno at night with NV goggles and silenced MP5´s, we chose night because we had the advantage of NV and silenced weapons anyway, we went into town to loot a hospital when we saw 2 bandits up on a roof. we started to get worked up about wheter or not they saw us! so we stuck to the darkest areas we could find and snuck up on them...it took about 20 miuntes of sneakig before we were able to get close to them and when we were close enough...we popped them in the head, and just that moment was so awesome! never had an experience like this before and i was shaking so bad that i had to go to be LOVE this game and will always do!