EXPERIENCED IN PERSON:
[video=youtube;CxTbNTyWIvc]http://www.youtube.com/watch?feature=player_detailpage&v=CxTbNTyWIvc#t=199s[/video]
Just insane to be with so many people rooting for the US in Boston. Was incredible.
[video=youtube;2O7K-8G2nwU]http://www.youtube.com/watch?feature=player_detailpage&v=2O7K-8G2nwU#t=303s[/video]
Seeing an Olympic 100M in person was insane. Seeing Usain Bolt win it was more insane. Seeing him win the 100M, 200M and 4x100M in person was even more insane.
[video=youtube;9-gOCOu_KGU]http://www.youtube.com/watch?feature=player_detailpage&v=9-gOCOu_KGU#t=1951s[/video]
Was insane to see Mo Farrah, Jessica Ennis and Greg Rutheford all win gold for Great Britain in the same night in London.
[video=youtube;sAfhf_u_QBI]http://www.youtube.com/watch?feature=player_detailpage&v=sAfhf_u_QBI#t=197s[/video]
This was even more special because you would've thought Team USA was really Team GB. The old record was held by East Germany - so everyone in UK etc. loves seeing anything from East Germany fall. Plus Carmelita Jeter was a badass.
[video=youtube;Nm-6JXOmalo]http://www.youtube.com/watch?v=Nm-6JXOmalo[/video]
Gymnastics again. Team USA was INSANE. McKayla Maroney's vault was just unreal.
[video=youtube;odMzp0CJ50s]http://www.youtube.com/watch?v=odMzp0CJ50s[/video]
I saw all of the Team USA basketball games - but something about seeing them dominate like they did against Nigeria was insane. They won 156-73. Melo's streak of threes was amazing and the Russ Westbrook alley-oop was insane.
[video=youtube;D3qP5ZSbQzo]http://www.youtube.com/watch?feature=player_detailpage&v=D3qP5ZSbQzo#t=7120s[/video]
I live in Texas - so HS football is huge. My old HS (siblings still there) won the State Title this December. Insane to watch it happen in person with your whole town.
[video=youtube;cbFNFHsNo3w]http://www.youtube.com/watch?feature=player_detailpage&v=cbFNFHsNo3w#t=46s[/video]
Loudest I have ever heard a building. Easily.
HONORABLE: UConn's Big East 2011 Games, UConn vs. Texas in 2010, Penn State over Illinois 2012, Penn State over Wisconsin 2013, Ohio State over Memphis in 2007 Elite Eight, Penn State over LSU in 2010 Capitol One Bowl, Ohio State over Texas in Austin in 2006.
ON TV (MY TEAMS):
Won't repeat these videos - but #1) Ohio State - Miami, #2) Indians-Mariners, #3) Cavaliers-Magic (LeBron's shot), #4) Cavaliers-Pistons (LeBron's final 25), #5) Indians over Red Sox in Game 2 of ALCS
Coolest thing I watched live, though, was easily USA-Nigera (again?) in the 2010 World Cup. Was at a soccer bar in NYC and experienced something similar to this...
[video=youtube;jbn3rOPmR9w]http://www.youtube.com/watch?feature=player_detailpage&v=jbn3rOPmR9w#t=43s[/video]