[chuck-users] code to run when "remove shread" command is sent

Hi all, is there a way to run a bit of code after then ChucK receives the command to remove the shread? I'll try to be a bit more clear. I'm using a MIDI controller and my script controls its LEDs. the point is, when I remove the shread, the LEDs remain on. so I'd like to turn them off when the shread is removed. cheers, Mario