Each argument found after the first found exposed method is treated as
an argument to the method itself.
So you can write /controller/arg1v/arg2v/arg3v instead of
/controller?arg1=arg1v&arg2=arg2v&arg3=arg3v the two are equivalent.
Just pay attention to the index method.
When called as /index/1/2/3 everything works, but to achieve /1/2/3
you will need to use _default instead of index.