From this month’s Skyline Type Foundry update:

Last month I spent half a day up on a ladder flaking several years of accumulated type-metal off the ceiling of the foundry. When molten metal escapes from the caster it’s called a “squirt”, and it goes straight up and straight left (sometimes straight right too). The operator, standing in front and slightly to the right, is safe—provided you don’t have your face in the machine at the moment the piston drops (that’s the first thing you’re trained not to do). Almost all squirts are preventable. But they happen—mostly from inattention, or fouling of the stripper spring, which causes a jam-up where the type is delivered from the mold. You gotta to be ready to instantly shut ‘er down if it happens. The Thompson Type Caster was patented in 1907, and is most certainly not idiot-proof. You never take your attention off the machine while it’s in operation.