When you trigger the free spins you have to choose one free spins symbol and I chose the one on the second reel and it gave me only 10 free spins and the one in the third reel was hiding 55 free spins. But for what is worth I triggered the safe bonus during the free spins and now I had to choose one safe symbol and again I chose the one that was hiding the lowest amount of only 4.80 . All the wins during the free spins are multiplied by 2 and all I got was about 14 euros.
There is another interesting bonus here called the Escape bonus. After you land 3 manholes on the first, third and fifth reel you trigger the bonus. Then you need to pick from the icons and when you open 3 matching amounts that is your prize. I truly believe that this bonus does not happen that often. I had a very short session, but if you play longer than me maybe you will trigger it more often.