A couple of session ago I used a barbed devil as an improvised weapon.
This was 5e
and I was playing a barbarian. Argued that if I grappled the thing and forcefully moved it through an enemy, it should take damage from it's spiked feature. And that since I am raging, I should get not just my STR bonus, but also my rage bonus. Forgot to argue that because I was enlarged, I should get a d4 on top of it too. The DM had a minor aneurysm, it ended up doing mediocre damage, and we all had a great laugh.