Helping my mother move her very large and heavy, old fashioned tv unit with shelving (she was putting it in another room and making a space for a new flat screen that wouldn't fit in the shelf.) I had one end and she had the other, and I had to let go with one hand to open the door.
"You got it, mom?"
"Yep, I've got it! Don't worry!"
"You sure?"
"Absolutely!"
"Ok..."
I let go with one hand to reach behind for the doorknob and the entire unit slammed down onto my big toe, shattering it. She didn't have it
In hindsight, she is 4'8" and 91lbs, so not a lot of upper body strength. I probably should've just set it down, opened the door, and picked it back up, haha!