"Probably a converted note selling discount shares."

I think you are correct, Willy. These sudden spikes in volume come around now and then, and are fairly meaningless in isolation. That aside, and as part of weekly volume, Friday's market was hardly unusual.

http://finance.yahoo.com/quote/LBSR/history?period1=1439561566&period2=1471183966&interval=1wk&filter=history&frequency=1wk