So, revision. Kind of rolling both actions into one to represent it being, instead of a choppy sort of "do A then B", a rolling narrative stream-of-consciousness, which (to me) fits Tony rather well.
[X] Total Write In:
Use our phone to text JARVIS as we're staying mobile with Peter and Hank. Make a somewhat loud remark to Hank about how he's got to prove something to Reed, or some other such thing. Basically, make it seem like our moves are posturing.
As we are walking across the floor, we're texting JARVIS that we think there's a problem and at the very least please alert Security, and if possible get it where the administrators call for an evacuation without us just walking over to them.
We snag Pepper on the way, making a big deal about how she's our God's Honest Witness that we're totally about to do an awesome thing that's not a weapon so haha Reed Richards there you are Pepper tell him you're practically CEO at this point.
All the while using our phone to alert JARVIS, Pepper, the Security detail, event administrators, and the police (mostly with JARVIS doing the "heavy lifting" since he can multitask).
Hopefully we get to Reed and his lady friend just as the cancellation and evacuation is called, and we just happen to exit the event in a group, making sure Hank, Peter, and Pepper don't leave our sight.