You are looking at a command called growl
growl
growl at {object}
You can growl at nothing specific or direct your growl towards an object.
growl
growl at the frog
This is a very rushed job as a demonstration.. needs some text ability.. like find: [nod]
eg growl what are you doing here!?
scripting notes:
This sends out the trigger word 'growl' so you can react like this:
if target of growl then imscared;
##imscared: print "[$actor] runs away";