You know, just in case.
Then a green four-door vehicle crossed from the southbound lane on Richmond Street to the northbound lane, stopping near Zimath as she waited for the bus.
"Two guys got out. I thought maybe it was somebody dropping their kid off to take the bus to school," she said yesterday, fighting back tears.
"But then they came at me. They grabbed me and started punching me . . . I thought I was blocking my face, but then I could feel that my teeth were no longer in my mouth."
The thugs pummeled Zimath something awful, breaking a bone above her gumline, before hopping back into their car and speeding off with her cellphone and purse.
Bloody and swollen, Zimath, 30, staggered to her brother's house not far from the scene of the attack.
Doctors at Temple University Hospital stitched up her cuts and wired her teeth back into place. But the mother of two now faces an uncertain and likely expensive recovery.
The two attackers, meanwhile, are still on the loose.
They were described as Hispanic men in their 20s, both of whom wore white T-shirts and blue jeans. One was 5-foot-9, 160 pounds, while the other was 6 foot and about 170 pounds, said Capt. Mark Bergman, the commander of East Detectives.
Zimath said two other men waited in the car while she was attacked.
Bergman said investigators are scouring the area for witnesses and surveillance cameras that could have captured images of the robbers. Tipsters should call 215-686-3243 or -3244.
Zimath said the crooks used her credit card at a BP gas station at 5th Street and Lehigh Avenue a few hours after the attack.
Word of the vicious beating spread like wildfire through online pages for Port Richmond and Fishtown on Facebook.
Lifelong Fishtown resident Margi Megill was among those who were outraged by what happened to Zimath, who is a favorite of regular customers at the Wawa on Richmond Street near Allegheny Avenue, where she has worked since 2001.
"I wouldn't wish this on anyone, but I was so upset when I found out that it was her," Megill said. "She's so bubbly and happy. She always goes out of her way for her customers."
Rich Wilkinson, the assistant manager at the Wawa, said some customers brought flowers into the store. Others visited Zimath at her home.
"Her husband heard her on the phone saying, 'Don't hurt me, take whatever you want,' " he said. "The violence was totally unnecessary."
The store is seeking permission from its corporate office to set up a donation jar for Zimath, who will be facing hefty medical bills for the foreseeable future.
"It's so nice to see that everybody cares, it really is," Zimath said, as her fingers gingerly moved across her swollen cheek.
"There was $30 in cash in my wallet and a $100 gift card," she said. "My debit card had $5 on it. That's all they got, and now I have so many bills coming in."
On Twitter: @dgambacorta