Saccadic: adj. jerky, twitching
Newkirk was glad this latest man was just passing through. He knew well enough to take advantage of chances to hone his skills, but this was the only time he'd ever encountered this, and he doubted if he would again once the man finally left.
"Poker?" Private Marsh asked him hopefully as he walked past, and Newkirk offered the first excuse he could.
"The Colonel needs me to sew some uniforms now, but maybe later."
Marsh was a little disappointed, but Newkirk was far more relieved. It was hard to judge the tells of a man who never stopped twitching.