Indeed, that slap was delivered by Leng Xuan. However, the speed of his strike was terrifyingly fast, which was why no one could clearly see it. When Leng Xuan vehemently denied it, there was nothing anyone could do to prove he was the one who had slapped.
But Madman was no ordinary thug; although uncertain whether that slap was really from Leng Xuan, just the attitude Leng Xuan gave him was enough to irritate Madman. Moreover, with his subordinates looking on, if this got out, how could he maintain his face in the underworld? He sneered and cursed, "You little punk, do you think you can act so brashly in front of Laozi? You think I won't kick your balls into oblivion?" As he spoke, he raised his foot aiming for Leng Xuan's groin.
"Slap!"
In an instant, another loud slap rang out, followed by a howl. The one called Madman spun in the opposite direction, seeing stars, and sat down hard on the ground, with the other side of his face swelling up as well.