Everything was happening at once. Too fast to take it all in. Keiko had always been bright, but intelligence was contingent on time to plan. It was slow thought, methodical thought. This was gut-thought, instinct thought. Reflex. And ultimately...all too often...just plain luck. Keiko believed that the universe had a sense of humor, and its jokes were usually at her expense.
Because of that, when given a choice of which would be the most critical to capture in a situation like this...the SWAT truck, or the little old lady...she leaped at the SWAT truck.
...and landed right next to it before projecting an illusion of Kitsune dropping down in front of the old woman and holding out a forestalling hand.
"Hold it right there!"
(OOC - Basically she's focusing on the elderly lady...evaluating her reaction with Sense Motive. If the truck starts to try to get away or if Sven needs help, she'll help him.)