AHH! Right air vent smoking!! some coolant is dripping!?! why!?

[tawaty]

i just arrived home tonight and as i park my car and turn it off, the right side air vent is just smoking! i look around the car, and i see coolant leaking from underneath the car! i JUST put antifreeze this morning and checked my oil and everything...what happened!??! HELP! i dont think im gunna get much sleep tonight! (i drive a 2000 boxster 5-speed manual) what should i do? what do you think it is? thanks!

oh one more thing..there is no check engine light or anything. i mean i stocked up the fluids this morning, and i only drove like 10 miles from starbucks to back home, and i parked my car and saw this trouble. and also, as i was exiting from the freeway, i heard a screeching/humming sound...i thought it was the construction going on around the area..but now im thinking it could have been my car. any help would be great..thanks guys.