The hotel (Bellagio) kitty corner from ours has a large fountain show in front. I noticed it as soon as we got there, but wasn’t sure what it was, as it looked just like tracks in a pool. We thought it might be the Treasure Island pirate show, but decided that was in a different location. We eventually found it was a set of high pressure, individually controlled water jets used to put on a fountain show, which was quite nifty. From a distance the sound of the high pressure water jets firing sounded like gun fire and the first time it went off I thought we were hearing some gang warfare. Up close, as you can hear in this clip, loud music plays which luckily is hard to hear from any distance.