Questioner CH.9 Renita

why dosen't Lina and Doon stop the man who comes out the unknown door. why dosen't Lina hold the door when the man comes out so she could try to see what's behind that mysterious door in the pipeworks that Doon and has been stressing about.Why didn't Lina and Doon just ask what's in the roped off tunnel and tell them their's no sign of cave in