seems like teh grip got turned down bc the sun was shinin right on the surface n that kinda makes the essential oils in the asplahlt kind of seep up so it makes the surface slick. thas proly why you slid a bit. if u see in nascar races they spray coke on the pit stalls cuz when it dries it gets sticky n helps em grip, bc the sun makes the surface seep essential oils which are the slickest oils u can slip on.