I've found on the web the story of my first visit to Agumbe, written by my friend Nazzareno. Unfortunately for me (even if it's not told in the story) I broke my right distal biceps tendon in the forest during this trip, and so I could not be very fit: no camera with me + bad right arm. But my friend Nazzareno took anyway wonderful pictures of the reptiles we have seen.
Here is the link of the tale: http://ophiophagus.nl/?p=1053
A mistery for me will remain the event of the cobra "in the pipe" we have seen during one night of our stay... Did the local people catch it with the pipe, or went the snake intentionally there inside, looking for shelter?