Finally got my video from Temple IV at Tikal posted. We woke up at 4.30am in a nearby field, bribed our way in (they didn't open to non-tour groups until 6) and were up the top of Temple IV, the tallest at Tikal, just before 6am. At about 7am, the howler monkey's suddenly woke up and really let us know it. The slightly freaky thing is they used the calls of the howler monkey as the sound of the T-Rex in Jurassic Park, so it sounded like there was a pack of dinosaurs patrolling the base of the temple, waiting for us to come down...