It is too bad that you didn't think to backup what you could in the small window of opportunity you had. A dropped drive = physical damage. To recover the data, you will need to deal with the physical damage first.
If your data is of value, send the drive to a reputable data recovery lab who has the clean room and equipment needed to recover your data. But, be prepared that it might be unrecoverable now. If the heads started to crash and the drive has been powered on for any amount of time, they will scrape the surface off your platter to the point where there is no data to be recovered.
As the drive is clearly spinning, there is absolutely no reason why any reputable lab who knows what they are doing would ever take the platters...