how to stop execution

[Steve Gehlbach]

RR seems to always be running my code, I don't see a way to stop 
execution, while developing.  Anyone know a way to do this?

Occasionally I get stupid loops and it can be difficult to get things to 
stop while I fix it.  Usually RR sprays error boxes and croaks, but when 
I restart and load the stack, it goes right back to doing the same 
thing.  I just want to load and edit it, not run it (not until I fix it 
anyway).

-Steve