Are you sure it is coolant? The screenwash tubing often fails and that is on the firewall above the tunnel.
To check re the screenwash: drain the reservoir (the old trick of syphoning it out with a length of plastic tubing -- go to an aquarium supplier) then re-fill it with water with a coloured dye. Operate the washers, and if you get a coloured drip, that's your problem. But why not just drop the dash ? Easy and nothing to be afraid of, use a blanket etc to protect whatever it might descend upon.
