A horse is a very STABLE animal- horses are usually stable and they are usually n stables
An elephant’s opinion carries a lot of WEIGHT-elephants are heavy and opinions do carry a lot of weight, just not that kind of weight
Was Darth Vader's pun FORCED?- get it? he uses the force and some thing the pun was forced
It's wordplay and wordplay makes a pun
Here's more from that definition you were using
"the pigs were a squeal (if you'll forgive the pun)"
synonyms: play on words, wordplay, double entendre, innuendo, witticism, quip, bon mot
I've had this conversation with my buddies a while back, I see what you mean, you think it's a joke but not a pun, but when you look at multiple puns you start to see what it means to be a pun, and while you may or may not like it, it's a pun.