last time some a*shole did that to me I rolled down my window and said "this d*ck isn't going to suck itself"..
he then felt like an idiot and stopped waisting gas LOL
2008 M3 Sedan + catless + Tune
2012 CLS63 AMG
2014 M6 Coupe + catless + KW V3
2015 Porsche GT3