Just after Coconut's heart stopped, I noticed that his tail was all huffed up the way a kitty's tail huffs up when unexpectedly encountering another kitty.

  Coconut had left & was at the Bridge & there suddenly were all those kitties waiting to meet him with Tumbleweed right in the front, his yellow-green eyes sparkling with excitement.  So many kitties meowing their welcome, eager to sniff noses & exchange headbutts.  I think he was taken by surprise, momentarily startled, & like the feisty kitty he was he bushed up his tail! That was my sign that he was safely at the Bridge where beautiful sweet kitties go to be blessed with light & love forever. I wish so much that he was still here with me, but I know that was not possible anymore.
Tumble & all of the others have him now.