http://www.freerepublic.com/focus/chat/3258944/posts?page=44#44
It’s more likely that impacts on the Earth took place as a consequence of the interloper having shaken loose debris of the outer Solar System. The link goes to an earlier post about Toba.
Could one of those impacts been the Barringer crater in our southwest of about 50,000 years ago? Would that be the right amount of time to travel from the Ort Cloud? Or perhaps the cluster of impacts that took place in Argentina a little over 4,000 years ago that may have been the cause of the disastrous First Intermediate Period in Egypt described so eloquently by Ipuwer.