Answer the question about text:

With the car jacked up about 75 % of the way needed to get the full - size tire off , a random big athletic guy came up out of nowhere and asked if I wanted help . I said " If you can help , please , I ' m about to have heatstroke here . " He cranked the car the rest of the way up , swapped the donut for the flat , and let the jack down . He then took off , refusing anything more than a " Thank you " for his assistance .

What may have happened before the athletic guy came ?
I got a flat tire .