Sudden loss of trans fluid

After a spirited jaunt....my transmission fluid emptied on the road. Underside of car covered with fluid.

I was manually shifting from 1st to 2nd and about half mile down the road I started to smell the fluid burning on the exhaust pipes. Pulled over and the fluid rolled out to my feet...not good. I had the vehicle towed back to my house.

Any ideas what may have happened? I did not hear any bad noises or see any apparent cracks or breaks. I cannot see where the leak is coming from but it seems really wet by the trans line fitting on the driver's side. I will put the car on jack stands and fill the trans again to see if I can pinpoint where the leak is. Any other tips?

Thank you