Firefighters grab hold to a 21-year-old Concord woman who became stranded on a rock in the Merrimack River downstream from the Sewalls Falls Bridge after a pool raft she was riding deflated Wednesday, June 30, 2010. The woman, who declined to give her name, was traveling with two friends, also 21, on $5 rafts, she said. Three Concord firefighters reached her about 1:20 p.m.. The woman really wasn't prepared for what she was doing, said fire Battalion Chief Bill Weinhold. "It's unfortunate that people put themselves in a position where we have to come and get them and tie up resources."