Flash mentoring is ideal for job shadowing, reverse mentoring, and more. The act of job shadowing may also constitute interning. He spent time shadowing lawyers and observing courtroom proceedings in preparation for the role. This normalization results in better invariance to changes in illumination and shadowing. Interpreters also use the technique known as speech shadowing. This can use an interferometrical function, focus variation, light deflection or a beam shadowing principle. Vocal repetition can be done immediately as in speech shadowing and echolalia. Hyperechoic stones are seen with accompanying posterior shadowing. Moreover, such vocal imitation can occur without comprehension such as in speech shadowing and echolalia. Some languages disallow variable shadowing completely such as CoffeeScript. Some languages allow variable shadowing in more cases than others. Later research using Cherry's shadowing task was done by Neville Moray in 1959. This is analogous to the programming notion of variable shadowing. At 0630, "Repulse" reported seeing an aircraft shadowing the ships. Block scope can be used for shadowing.