Lex counted each second that Powell was gone, though his mind kept telling him not to do that. Unless Powell was able to get something from that planet that still contained its aura, Lex would have to spend a long time reaching it no matter what.
Instead of wasting time and energy, Lex began to refine his plan once more. There were a few areas where he would have no option but to improvise, he began considering various actions he could take.
Even with his mind distracted, Lex was all too aware that he tapped his foot on the ground 9 times before Powell returned. Due to his agitation, the speed of his tapping was fast, translating to two taps per second. Powell took 4.5 seconds to go and return. Although Lex had asked him to hurry, that kind of efficiency was remarkable.