Where did he get the confidence?
This was something that could not be explained by physics. Some mechanics had calculated it, and at most it had a 70% chance of success. This meant that there was a 30% chance of failure.
Zhang Shan was not proud. He was already entirely immersed in the battle. He was so focused that only Sweeney was left in his eyes. This was his test, his barrier, a barrier that he needed to cross.
The beam saber followed closely with a stab, but Sweeney immediately became invisible. The mech could not disappear immediately, but it could cause visual confusion. It was an instinctive reaction to pause upon losing the target. Zhang Shan's sword still swung out, but upon hearing the sound, he knew that Sweeney blocked it. With the sound of the mech moving, Sweeney disappeared.