Board Thread:General Discussion/@comment-4913740-20130628164607/@comment-1504072-20130715124936

1.64.167.195 wrote: So my guess is - Mantis does exist as a real person in TPP, and (due to an unknown reason) tricks Big Boss in the hospital by learning that Volgin is someone he fears a lot (he wet his trousers in MGS3 due to Volgin's torture, etc)

Big Boss did so after being electrocuted, rather than through fear, although Volgin may still have scared him somewhat.