I had my first reserve ride on friday, on jump #40.After mulling it all over through the weekend, I realised 2 things: 1)I am fortunate to survive my own stupidity 2)Following my training played a large part in living to jump again I mis routed the bridle causing it to foul the pilot chute, giving me a pilot chute in tow. I tossed out the pilot at 4500 and about 6 seconds went by without feeling the usual drag. six turned to 10 and I am still on my belly. about 11 sec into this I invert feet down, look up to see nothing over my head and feel my speed increase. I was taught "touch the handle or pull the handle, cut away" even if you dont see anything out. I pulled red, pulled silver and was under the reserve at approx 2700 ft. I saw the main float away from me, out of the bag. If not for following what I was trained to do by my instructors I could easily have turned this into a fatal error. Reading the other posts here on similar situations reinforces for me that I reacted properly under the circumstances, and gave me a chance to learn from my ignorance instead of paying for it in a big way