The postgame handshake between Lions head coach Jim Schwartz and 49ers head coach Jim Harbaugh nearly turned into a scuffle between the coaches, after Harbaugh’s team pulled out a 25-19 win in Detroit. An excited Harbaugh ran across the field with his arms in the air, pumping his fist to celebrate the victory. Harbaugh then emphatically slapped Schwartz’s hand and patted him on the back, with Schw…