Slipped

He slipped the pen off the desk and into his pocket.

He slipped on the wet steps and tumbled down the stairs.

She slipped on the rug and nearly fell down the stairs.

She slipped up and revealed the surprise party to the birthday boy.

She slipped on the wet spot in the kitchen and dropped the dishes she was carrying.

The building's safety standards have slipped over the years due to lack of maintenance.