Pet peeve, but I hate how in media, people can easily lift up manhole covers without much effort, especially the ones in the middle of the road. These things often weigh dozens to over 100 pounds. They are also usually sealed with the road with debris asphalt. To get one open, my coworker and I have to usually bang on the lid with a sledge hammer to loosen it up and use a screw driver to chip away the surrounding debris. We then have to use a manhole hook to lift it open. Even then, we only lift it high to get it open and then we draft the lid away from the hole itself.
Bonus facts: the reason why most manhole lids are circular so the lid won't fall into the hole no matter which way you turn it.