Why blame the cashier when you should watch the screen?

Nah, @johnson.paul, touch really can be enough, I've done my whole head blind and it came out fine.

Those galvanized spikes are heavy as hell though, I carried 12 of them on a 9 mile hike into the Chisos and felt every ounce by the end. Titanium ones cost a fortune but at 60 cents an ounce I'd rather cry once at the register than every step on the trail.