A table may include a table top and a leg assembly. The hollow, cylindrical cam is pushed onto the cylindrical shaft and securely fixed to the cylindrical shaft in terms of rotation and displacement. The method may further include generating an electronic message for the device wherein the message contains at least one link for acquiring the at least one application when the device supports the application. Each of the event codes in the set of event codes represents a predetermined event which may occur in the performance, the event codes being selected by the user when an event corresponding to the event code occurs during an observed performance. The hand tracking system tracks a location of part of a human hand.