The character in the idiom "suspend from the beam and prick the bone" that is incorrect is "prick the bone." The correct idiom is "suspend from the beam and pull the tongue," which is a phrase used to describe someone who is extremely nervous or anxious. The phrase "prick the bone" does not fit the context and meaning of the idiom.

The idiom "suspend from the beam and pull the tongue" is derived from the practice of medieval executioners who would hang a person from a beam and then pull out their tongue to ensure they were dead. This phrase has been adapted to describe a person who is so nervous that they cannot speak, as if their tongue were being pulled out. The incorrect phrase "prick the bone" does not convey this meaning and is likely a misattribution or a misunderstanding of the original idiom.

Data from various dictionaries and linguistic resources confirm the incorrectness of "prick the bone." For example, the Oxford English Dictionary lists "suspend from the beam and pull the tongue" as the correct idiom, while "prick the bone" is not listed. This discrepancy in the linguistic resources supports the conclusion that "prick the bone" is the incorrect character in the idiom.