Never rest your feet on the lower level of your coffee table and let your dog sleep under your legs.
Because when someone unexpectedly rings your doorbell, your suddenly alert dog will stand up as quickly as possible.
Your legs will then be trapped against the edge of the coffee table while being pushed up by your pet who is scrambling to get to the front door.
Then you will scream in pain and curse filthy words.
The person at the door will hear your cries and you will be thoroughly embarrassed because she has never seen that side of you before.
And you will have a bruise along your ankle two inches long, just in time for shorts season.
This has been a public service announcement.
Thank you for your time.