so i parked at about a 20* incline and went to go eat. came back out and there was coolant all over tthe ground. was coming from the back of the engine. below the exhaust manifolds. coolant elbows and all hoses are fine. when i got it home and on a flat surface it didnt leak. filled it up and it still didnt leak. ran it and it didnt leak. anyone have any ideas?
i did recently switch from dexcool to green. flushed the entire sytem and bled it. was not beating on it. just normal driving...

trying to figure out what it is before i tear into it.