That sounds good. Crashing an event seems like a good ay to create chaos. Maybe Jamie and Laurel bump heads about her barging into the event before she gets a tip from an agent in the van about movement upstairs and he like...follows her to argue with her some more. Which ends up being a mistake ha.

What exactly should happen to him that puts him in the coma? Just getting shot or something more?

We could start when the event is in full swing and Laurel arrives to search for the thief. Just before things start getting messy.