<prompt> Translate the following text to EnglishHata mkono wake ulitikisika kana kwamba misuli fulani ilianzishwa na kumbukumbu ili kufanya mojawapo ya salamu hizo za kijeshi zisizo rasmi ambazo wapelelezi walipenda.  <response>: Even his arm twitched as if some muscle was activated by memory to make one of those informal military salutes the scouts favored. 