Thomas the Tank Engine is barreling down the train tracks at 290kmph. Ahead on the tracks are 5 animals, a red panda, a giant rat, a squirrel, a camel and an alligator. Thomas is headed straight for them. You are standing some distance off in the train yard, next to a lever. If you pull this lever, Thomas will switch to a different set of tracks. However, you notice that there is a shopping cart on the track. What would you do?