He started coughing, and his vision was getting blurry. He had re-opened his leg wound, and was bleeding again. He managed to crawl into a car dealership nearby, and hide under a desk where he could patch himself up after going to sleep. He was, after all, very sleepy.
After a few minutes, a couple of Zombies walked in. He couldn't actually tell if they were zombies or not, but they were moving slowly, and were very blurred. Regret didn't even try reaching for his USP because he knew that if he shot he was more likely to shoot his own foot more than anything. All he could do was wait, and while waiting, he fell asleep.