Flying out of SFO was in DC10 taking off to the north circa 89 We were getting up to speed when we went into full stop mode. The air brakes were up reverse thrust full braking with the plane hopping. While still rolling we pulled into one of the turnoffs. Looking to my right I saw a plane on the intersecting runway take off to the east. The copilot announced in a calm tone we would have to return to the hanger area for a brake check and refuel so our flight would be delayed two or so hours. Meanwhile on his open mike could hear what the pilot said to tower: what the f/?k are you trying to do kill us? He was really wound up. Apparently both had gotten or thought they had gotten take off clearance. Scariest take off I ever had and I’ve flown millions.