I'd die before I went to a theater with that many humans.
Lol i went to early harry potter midnight showings that had up to 20 theaters full many cosplayers ect the energy is crazy.
Stuff like that is more an event like a playoff game , concerts ect.
I do draw teh line at stadium concerts, they just are not worth it ever in my experience. The sound is horrific and the hassle of getting somewhere with 40-70k ppl would take a once in a lifetime chance to even get me to consider it again. But its very very unlikely i would go to any outdoor or American football stadium of that size for a concert ever again.
SNSD OT 9 at the Tokyo dome is probably what it would take to get me into anything over basketball sized.