Careful BD, zoo gorillas throw poop.
The tongue pop scenario is interesting guesswork. I can do tongue pops but the volume is low. 'Wood knocks' are a subject that I do not follow. One must identify the sound type and source at 'point blank range'.
I have had 'percussion type' incidents in the past. A widow maker falling from the forest canopy and crashing to the ground. Also, I would walk up a snow covered Forest Service Road to perform seasonal altitude checks at a track way site. I was followed by something making sets of booming 'knocks'. They sounded like wood on wood in sets of 5 in repetition. The timing seemed mechanical. The sound was always above and behind me. I suspected a bird. Months later when I was at the track way site, a Sooty Grouse came at me from the treetops like a dying Hail Mary pass and landed several feet from me. Walked around and hooted. Verification at point blank range. Peterson Field Guides, Western Birds, attributes ventriloquism to Sooty Grouse. I did not need to be stalked by a ventriloquial game bird. The Sooty Grouse that stalked me was very loud. They have to be loud to go the distance to find a mate. The sounds that I have listened to on the web are very muted. The Sooty Grouse has an extensive range in Western North America.
Do not be the subjects of fowl play.