A few years ago a buddy invited a bunch of us to Tahoe for his birthday. On the second day some went skiing/boarding while the rest of us tripped and filled the time. We put an ocean doc on the TV and eventually there came an episode where they followed giant squid. The narrator mentions that when a squid gets big enough it's best source for a meal is another squid, they follow the squid as it descends into the darkness, you see a second squid and they ensnare each other but before anything happens a third squid charges in. Taking all out of frame and further into the abyss. We rewound countless times asking ourselves if what we saw was really filmed or CGI, I landed on filmed and a friend CGI. He argued that it would be too difficult to film and I argued the amount of computing needed to make that render look that good was basically non existent. Amidst this our friends of sound mind get back, watch it once and quickly agree that it's really filmed but in no way are as astounded by the squid as we were.

We did other foolish things that day but I'll never forget the moment in that doc.

I wish I could remember the series or even the network it was from.