Async call to drb server?

I have a cgi script that’s calling a drb server – currently the cgi script
is waiting for the drb calls to return. Is there a way I can have the cgi
call to the drb server return immediately and let the drb handle the heavy
stuff? I imagine I could build the drb server to be threaded, yada yada …
but was just wondering if there was some magic way of doing this without me
expressly building it.