"the corridor" can be found in the blog if you click on sumbit your question to ask the ump (or by clicking here
http://community.myfoxboston.com/blo..._Ump?page_no=6 ). in the segment below, near the end, veteran umpire ed king states that the runner going to first HAS TO RUN IN FOUL TERRITORY in a 3 foot restraining area.
ATU- 6/24: Runner Interference
http://www.myfoxboston.com/myfox/MyF...1&locale=EN-US