Convertibles and Trains and Bicycles

I've been heading out to practice my panning the last couple of days. I've take nearly 400 shots of moving cars, bicycles, buses and trains and I have a few that I think have turned out Ok... except I had the camera on ISO1600 after some night shots last night, wondering why everything was over-exposed or grainy...
Convertible on Enmore Road
Train approaching Newtown Station
Cyclist caught after attempting to run over photographer

Convertible on Enmore Road

Train approaching Newtown Station

Cyclist caught after attempting to run over photographer
