A game that takes place usually over a meal or any social gathering in an attempt to get everyone to actually interact with each other as opposed to being glued to their smartphone screens. The rules are as followed.
Everyone in the group must give up their phones and place them in a pile, stacking them on top of one another. The goal is to then see who can go the longest without their device. Then, whoever caves first, must suffer the consequences of whatever punishment was decided on prior to the stacking. Say you are at a restaurant. Everyone would stack their phones in the middle of the table. It is agreed upon amongst the participants that whoever grabs their phone first must pay the bill.
Person A - "We're playing Phone Stack!"
(Everyone's phones are put in a stack in the middle of the table)
Person A - "Whoever grabs their phone first has to pay the bill!"
*Several minutes pass, and Person B's phone goes off, and he/she grabs their phone*
Person C - "Hah! You lost! You're payin' up!"
Person B - "****!"
Video Example: www.youtube.com/watch?v=GvugLZE0DFk