I know it's a mortal sin in regards to doing that to people, but what about animals? I just picked up a spider with a paper towel to put him outside but I squeezed too hard and while he still alive his legs/body was messed up, so i'm sure he's/she's in pain :/ I didn't kill the spider because I don't know if it's a sin or not but feel bad because it definitely wasn't my intention to do that to it.