His jet plane, with the short, straight wings, might have been modeled after one of the Bell "X" planes such as the ones flown by test pilot Chuck Yeager. In the discussion, questions about the distinction between conventions and regimes of engagements emerged, as well as how possible symptoms of the constant struggle to handle the conflicting regimes could look like. Why you might ask, because of the general construction redesign. The final perforation of the vessel and malposition of catheter may occur in either way the catheter may perforate the vessel wall directly during the insertion or its tip may wear the vessel wall and later migrate through the wall.