Usually in form of not being able to think straight because of the awesomeness that just happened. A feeling where you just want to smoke a cigar, grab a minigun and drown anything in sight with lead.
This feeling is uncommon, some just get "Nostalgia" but this is in rush form which makes you totally unprepared and you'll be completely overwhelmed by the feeling. Which leaves you there incapacitated thinking about it rather than anything else.
Dave:Woah dude you cool?
James: All cool man, just Oh y-Yeahhh... Damn, I feel rejuvinated! Hug me bro! (all homo intended)
Dave: Get the hell off me!! If you're having another Nostalgia Rush I'm outta here!