I'm not sure how funny this actually is, but I found it extremely amusing at the time it happened...
When I first put Nova in his new tank he was fascinated by everything of course except 2 things: the leaf hammock and his little log cave. Now he swam around the log cave for an hour or so just STARING at it trying to figure out what it was (ignoring the hammock entirely, I'll get to that part in a bit) After he worked up the nerve he poked his head in the cave for a second and backed out, swam around it, and poked his head in the other side (did this several times) Finally he picked an end of it, went in, and frantically swam BACKWARDS out of it again (at least 3 times of this) Having worked up his nerve enough, he finally decided that it was okay and darted through it as fast as his little fins would go and bonked his nose on the other side of the tank xD I laughed so hard. After that he went through it slower a few times and was okay.
Now the hammock was entirely different (does this count as two stories? idk, I'm telling it anyway because it was so cute) he ignored the thing for 3 days. I finally caught him staring at it on day 3. I tried putting food over it and everything and he would look at the food, and at the leaf, and back at the food again and shimmy over the leaf as fast as he could forcing the food away from it. Then on day five I saw him staring at it again and he finally worked up the nerve to go sit on it. Well... having something underneath him must have freaked him out at first because after a few seconds he spazzed and shimmied all the way across it. Lol. Anyway the next day he was comfortably napping on it, so whatever problem he had with it, he got over xD
And here he is