anyone ever had fluid drained from their knee?

reading this makes me wanna:barf:
i have popped my acl a few times streatching it out and making it hard to walk on for a few days. then over extendin my knee in my sleep and not being able to walk for 3-4 days. i hate admitting when somethings wrong so i ignore this.
grahme and cooley saw me wipe out in the junkyard when my knee gave out on ice just walking it slipped outta joint.