Oh I bet he'll just love the walk. Remember to preserve a calm and in control walk. Don't let that energy of being a freak transfer to outside for you walk. Just get the leash and clip it on - if he freaks when he sees the leash just stand there still and calm looking at the floor and ask for a sit. When he does clip on the leash. If he freaks when you go to clip on just stop again and wait. Same with the door and the walk itself. They proceed when he is calm and he'll get that if you are consistent. You don't want the habit of having all that pent up energy dragging you down the street and feeding the frenzy. Just stop and wait and go on when he gives you some loose leash.
Reward for loose leash and if you have to don't speak or talk. Surely don't say "WANNA GO ON A WALK!!!!! YAY!!!! Just be calm and insist he be too.