I don't second guess myself on a lot of stuff in writing, but I always get hung up describing how long it takes for something to happen. Is it more appropriate to be precise? Ex: Its bleeding lessened in seconds, but its mouth continued moving for close to a minute. Or is it more appropriate to be vague? Ex. Its bleeding lessened immediately, but its mouth continued moving for a time. Does it even matter? I think this might be "that thing" I only notice when I've read through a piece too many times in an attempt to perfect it.