Actually was at Shea Stadium when I saw Willie, same with Hank Aaron in'71 during a Cub Scout field trip against the Braves. Same with Mantle in' 73, although that was a field trip with a NJ bar my late dad got us tickets to see.
During my lifetime, three Yankee walk-offs...first in '69 against the Angels. Rudy May had a 1-0 shut-out going into the bottom of the 9th, but Yanks got men on, and Bobby Murcer hit the two run double down the RF line that won it. I was 9. Similar in Aug. '83. Dave Righetti took a no-hitter into the 7th, but Geoff Zahn matched zeros. Angels scored in the top of the 9th, then Ken Griffery Sr. drove in the tying and winning runs with two outs in the bottom of the 9th with a similar shot. 23, just graduated from college, and at maximum energy! The '83 pennant race in the AL East was one of the better ones, but fell short in the end... 
But the best walk-off was in Aug. 2000 against the A's...Andy Petitte vs. Barry Zito, the latter of which was a rookie who impressed the daylights out of us. Game went back and forth, but A's held a one run lead into the bottom of the 9th. Jason Isringhausen came in to close things thing down, but Bernie Williams led off the inning by hitting a drive to right that snuck into the RF seats to tie the game. Bern, baby, Bern! Bedlam! Next up was David Justice, who ripped a bomb into the right center field bleachers that won it! We danced to "You make me want to Shout!" afterwards, before the Yankee anthem by Frankie afterward. Considering that it was work field trip/group outing that got mentioned on the scoreboard, an unforgettable night... Plus that, we won in the end...three-peat!
The great games you were actually there to witness in person last a lifetime!
