Honda clutch?

'94 Honda Civic, over 200k miles. No problems but today there was a very loud thunk & the clutch stopped working. Please tell me that this isn’t as serious as I am afraid that it might be…

Does the gearshift feel normal (with the engine off)? What were you doing when the thunk occurred?

The gear shift is frozen up. I was just coming off of the interstate on the off ramp