If Marty McFly went back in time thirty years ago today, what song does he play at the dance to blow everyone's mind?

"you made me realise"

just the "holocaust" section

i change my answer

if johnny b good was a hit the song we choose must also be a hit

so i'm going to say he performs a miley cyrus track and starts twerking in a bikini

sorry michael

Remember: the song he starts with is soon to be a hit, symbolizing a revolutionary new sound, in the period he's visiting. What he transitions into is hip with his generation and totally offensive and inaccessible to his old-timey audience.

Starts with Push it by Salt N Pepa and transitions into I've Seen Footage by Death Grips? Or are those too similar?

there's nothing he can do with a fucking guitar, that's for damn sure. i suggest he introduce his good friend hatsune miku.

i would modify that and say biff is on stage and forces him to dance and sing push it

kind of like how he makes him dance in part 3 by shooting his feet and marty starts to moonwalk

beastie boys - fight for your right

"Then tell me futureboy - who's the President of the United States in 2017?"

well, looking at the biggest hits from 1987 et 1988, I don't see anything that he could play to them shortly before it hits that would be a shock...
but "Pump up the volume" seems a good answer. Or maybe some new jack swing ?

or "Straight outta compton" released in 88.

Voodoo Ray? A bit late maybe, having been released in 89.

Though recorded June 88.

actually, in the movie, he plays jonnhy b good 3 years before it's released.
so we're looking for something from 1990 !

snap : the powa !

Killer - Adamski

91, but whatevs.

I'm not sure some of these would be especially out-there to people who were used to some of the more epic synthpop of the mid-80s. Like at this stage he'd be playing some house music and people would be into it but they really wouldn't be expecting a veer into, say, 'Original Nuttah' by Shy FX. Or any jungle really.

Actually that's probably the metal guitar solo bit rather than the Chuck Berry bit.

oh I've got one : "Smells like teen spirit" ! "91, the year punk broke" !
for mainstream kids from 87, that would be a big wtf, I guess.
and exactly like in the movie, I could see the actor smashing everything at the end of the performance in front of the audience in awe and struck by feedback.
on the other hand, that wouldn't sound much like the future in a "this will change everything" way...