I though that because the sonic may be re-done, that it could have frequency modes.
Frequency Functions.
Low Frequency: Open and closing doors/ activate button's etc, Medical Scans. Unable to Lock or Unlock them or turn things like Rollmines, manhacks etc. into friendly's NPC.
Normal Frequency: Basiclly what it is now.
High Frequency: Activate's doors/ Button's etc. and when soniced sparks fly everywhere and they become unusable, can also permanently lock Button's/ Doors etc. only way to unlock is to blow the door off or use the first function, Blows up Rollmines, manhacks etc.

Function Transitions:
LF: Closed Sonic.
LF to NF: the player twist's the top half of the sonic. (like what Matt Smith use to do.)
NF to HF: (Kind of obvious) the player flicks his wrist and it extends fully.

Maybe they should have diffrent speed's like,
LF: 5 secs to open/close doors
NF: 3 secs to open/close doors and to lock and unlock them.
HF: 1 sec to use its functions.
and finally the LF should make a deepish sound. NF should stay the same. HF should be a highpitch sound.