WEBVTT 1 00:00:01.585 --> 00:00:03.712 [announcer] Here's your challenge: 2 00:00:03.712 --> 00:00:06.965 How many times is the yellow backpack passed? 3 00:00:08.050 --> 00:00:09.092 Go! 4 00:00:09.343 --> 00:00:11.595 ( bell chimes ) 5 00:00:13.263 --> 00:00:17.643 ( indistinct chatter ) 6 00:00:33.575 --> 00:00:37.120 So, the yellow backpack was passed 17 times. 7 00:00:37.955 --> 00:00:39.998 But how aware were you? 8 00:00:42.626 --> 00:00:45.462 Did you notice that our scene moved outside? 9 00:00:45.879 --> 00:00:46.880 ( tape rewind ) 10 00:00:46.880 --> 00:00:49.967 What about the student who put on a hat and switched books? 11 00:00:50.050 --> 00:00:51.218 ( tape rewind ) 12 00:00:51.218 --> 00:00:54.012 Or the woman dropping the suspicious package? 13 00:00:58.141 --> 00:01:00.269 Sometimes it's easy to miss the obvious. 14 00:01:03.397 --> 00:01:06.858 Your next challenge: Be aware of your surroundings.