LOL...Nice! That's awesome you got to take your dad out, I'm envious! I wish my wife would go with me but she started freaking out on a parade lap...hot laps are probably a bad idea.
I can imagine that it got frustrating. Its one thing to be slow...I'm OK with that. Its another thing to be slow and oblivious. I heard in an advanced group meeting someone say..."Don't be all over my bumper, cut me a break!" Ok...so basically you can just not check your mirrors and have no idea what's going on around you. Wait...aren't we in the advanced group?
Not that its right to get aggressive but still. All should play nicely, not just the other guy.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red