Tip calculator app
When the app starts, the users are presented with a screen some number in the center, a button below and a type of slider on the circumference of the screen. The users tried to dismiss the app for a moment to attend a notification, but is not allowed to in the regular fashion, instead, the circular slider jumps around, thus inhibiting the user to leave the app. The users have then to play along and find the "new" way to leave the app to do what they are now in urgence to do, check the notification that arrived. The users may feel trapped, confused or that it is too complex for them.
