In cenotes we make a distinction between cave and cavern. Limits of a Cenote Cavern Dive : you are at a maximum distance of 67meters / 140feet from any exit (open water) you can always see the light from entrances. there are no restriction area : there is alway room for 2 people side by side.
1 In the non-canon music video for Derezzed, there is an arcade machine called Derezzed in place of the TRON arcade machine. 2  The Derezzed machine is labelled as being made by ENCOM, just as the TRON machine is labelled as such in TRON: Legacy.
Karaoke machines were initially placed in restaurants or hotel rooms; soon, new businesses called Karaoke Box with compartmented rooms became popular. Roberto del Rosario, a Filipino inventor who called his sing-along system Minus-One, now holds the patent for the device now commonly known as the karaoke machine.