Two for me.
When I was in High School (before I got my license), my mother was in the turn lane to go into Veteran's Memorial (large conference center really) parking lot. This was during the "Columbus Ford 500" race weekend.
Just as we were turning, this major douchebag comes screaming out to the right from behind us and right in front cutting us off. My mom had to slam on the brakes to get from broadsiding him. 1984 Ferrari Testarossa with RAHAL on the plate. Flicking us off and yelling "Get out of my way!" as he went sliding into the lot.
So I get to the "exhibit" I was going to. I told a neighbor I'd help out monitoring his cars. He owned ELEVEN Lamborghini's. 400GT, Mura, Jalpa, Islero, Espada, Countach (four models). Even an LM002 and a 50's farm tractor
Well, 10 minutes after I get there, Rahal comes driving in with his Testarossa and demands that we move one of the Lambos so he can park his car in one of the spots. He went livid because we didn't care who he was. Security had to escort him out. The saddest part was that all of the press around were obviously "ignoring" him. No cameras taking photos, no one writing down notes, nothing.
The second was at a Rush concert in the early 90's, I'm in the front row. This was at Cooper Stadium in Columbus. Open air baseball stadium. Some guy with a big cowboy and being a drunk ass dick shows up with a few big guys with him and sit folding chairs down right in front of me and my date. I ask him to at least take off his hat (it was that big). He turns, looks at me and says "Fuck off punk". ?!?!?! Well, I didn't just pay $80.00 for a ticket to have part of my view blocked.
So I tell him "Hey, now you've pissed me off. You're not allowed to just come up here and sit down". Again the fuck of, but now "Don't you know who I am". "UH, NO and I wouldn't give a shit if I did. Move the fuck out of my view!" This is when his goons start walking towards me. I stand up (not really afraid... years of martial arts and some friends were also in the row with us. I see some security moving my way and I tell the goons they might want to be smart and stop before 30 Westsiders stomp their asses into the ground. They actually paused, one of them reaching into his jacket. A guy behind me says "Dude, SLOWLY take your hand back out. Cause if you move too fast we're going to shoot you". I look back and there was three homies pointing guns at him
So the security shows up and this guy demands I'm removed. I explained what was going on and so did others and they escort him and his goons somewhere else.
Turns out it was Billy Ray Cyrus. What a dick.