We all love Star Trek (in this forum and context referring to TOS), but as much as we enjoy it we can still hit a moment in a story where we feel doused with cold water and suspension of disbelief suddenly falls apart. At that point we either cringe involuntarily, shake our head in disbelief or laugh ourselves silly. It might be a line like, "Brain and brain! What is brain?" It might be seeing a pink tribble. It could be anything. So share your WTF moments from TOS and/or TAS.