Why? That is the real question. Why not is the true answer. Thats is proabaly a fmous quite but who knows. Ok well I took the amazing truck built by AwesomeGuy12345 and made it amphibious with a new towing system capable of pulling amphibious trailers. Original flatbed trailer was made by TheCanadianCuban. Ok controls. Ag1=Magnet, Ag4+Trim=The little things that hold the trailer up when its not in use, Ag5+Trim=Trailer Ramps, Ag6=Extra Thrust, Ag7=Water Mode, Ag8=Land Mode, Vtol=Wheel Rotation, Pitch=Land Throttle, Throttle=Water Throttle, Yaw=Turning for land and water. It is a little confusing so here is the control sequence. Upon spawning land mode is activated by default. Land controls are active at this point. If you want to connect to the trailer drive backwards slightly and lift the trailer arms so the triler is level with the magnet. Press Ag1 to connect. The trailer is the able to be towed around. Then once you have whatever loaded on the trailer you can raise the ramps. I suggest putting magnets on to keep whatever you have on there in place. Then drive into the water at least under 30 mph. Then raise Vtol all the way and activate Ag7 and deactivate Ag8. Then throttle controls your movement. Ag6 gives more power. To get back on land put vtol in the middle and activate Ag8 with Ag7 still on. Use land power and water power to get back up then put throttle to zero percent and deactivate Ag7. That is how you control it. Also if you need to go up a steep hill use Ag7 and Ag6 throttle to help. Enjoy :D.