After splitting the re-inflated head open on two occasions whilst using pressurized air through a tube, the props department resorted to an old fashioned method to get the job done. They applied their lips to the tube, and blew.
At the time this episode aired Michael Paul Chan was also co-starring in "The Closer" since 2005 (after 7 seasons "The Closer" became "Major Crimes"). In this episode he translates Chinese language for Booth & Brennan, but as Lt. Mike Tao ("The Closer"/"Major Crimes") he tells his team that though his ancestry is Chinese he can not speak the language to the extent they need.