Replying to Who has torn their ACL?

I was just biking around and a banged the inside of my left knee off my frame pretty hard, not too painful but it was sore, then later i tried a small drop and as soon as i landed i felt some crippling pain in the same spot, i couldnt bend my knee and it felt like a hurt a ligament, its been a half hour and i can bend my knee now but i still have pain on the inside of my left knee.

my question is, on a scale of 1-10 how much does it hurt to tear your ACL or other ligaments?