1.  Masters of Disaster at the Salinas airshow last year.  
2.  Ohio ANG/NG mock air strike and air assault at US Airshow (Dayton) around 1985.  Low level recon pass by RF-4, A-7 strike (4 ship) with F-4 CAP (4 ship), AH-1 guns pass (2 ship), Then 4 x CH-47 troop insert, troops capture field, C-130 lands and vehicles drive out.  Whole thing took about 5-10 minutes.  Huge pyro on the air strike and the AH-1 and all the troops were firing tons of blanks and popping smoke.
3.  Same airshow, announcer directs crowd to look show left for skydivers, meanwhile B-1B comes in transonic from the right, full AB, scares the living crap out of everybody.
4.  First time I saw the classic F-15 demo with the vertical zoom  to 15k immediately after gear up.
5.  Robert A. "Bob" Hoover, Shrike Commander demo and Old Yeller P-51 aerobatics.  You don't appreciate the P-51 slow roll on takeoff until you try flying one in a good flight sim.