Continuity mistake: Booth chucks Parker's ice cream on the floor along with the napkin. When Bones picks up the napkin the ice cream has gone. (00:20:00)
Other mistake: Bones produces a gun and states that she got it herself. However it is explained in earlier episodes she is not legally allowed a weapon due to being arrested for shooting a suspect.
Answer: Answering my own question here but, having contacted various people involved in the production of Bones including Kathy Reichs, Hart Hanson, Eric Milligan, and Deirdre Lovegood who portrayed Taffet onscreen I finally have the answer. No-one know how she did it due to her constantly working alone. And she never revealed this information before her death.
Ssiscool ★