1. Computer comprising: processor; computer readable storage medium accessible to the processor and bearing instructions embodying logic comprising: permitting a user to select a first input mode with associated first input parameter; permitting a user to select a second input mode with associated second input parameter, the first input mode being different from the second input mode; and executing a behavior of the computer only when subsequent inputs of the first and second parameters are received in the first and second input modes in an order specified by the user.