Lawsuit @ work

so I am sitting in my office chair really getting down to business with the work here & I go to roll back to file away some papers I signed on & what happens?

this damn chair nearly topples over as the wheel comes of and has me being all ninja like in the reflexes to make sure I don't end up falling and cant get up.
the chair is over 10 years old with a rusty wheel base mechanism so yeah that's not good.
*almost workman's comp...