The phrase "putting on rack" is often used to describe subjecting someone to intense interrogation or scrutiny. Synonyms for this phrase include "grilling," "questioning," "cross-examining," and "probing." Each of these terms implies a thorough and often uncomfortable process of seeking information or answers from someone. Other similar phrases include "putting someone on the hot seat," "putting someone through the wringer," and "putting someone on the spot." All of these phrases suggest a process of testing, challenging, and possibly even tormenting someone in order to determine the truth or gain information.