I see the trophy attack as her being brave, not stupid (though the two aren't that far apart). And she works in the lab, so she obviously knows what the device is capable of, for both good and bad, so trying to save it makes sense. And attacking with the bunsen burner was resourceful. It's better than just standing there scared.
With the amount of chemicals in that laboratory, pretty sure she should have concocted something better than "burn with weak flame" especially if she's so highly intelligent. Hell, didn't she have the cure on her (or it was just about done)? If he was brave enough to try and set the Lizard on fire with a very weak flame (and risk inducing his wrath) why wasn't she brave (or smart) enough to just stick his ass with a needle full of the magic "make everyone stop being lizards" formula?
Also, what the fudge ever happened to that rat? Think he ate it?
Well the antidote wasn't ready until after he left, so that was out. And the lab itself wasn't exactly filled with all sorts of explosive chemicals. It was a genetics lab, those don't really lend themselves to attacking things.