student experiment

4:51

11:50

6:19

4:17

2:21

4:52

10:58

4:52

21:35

2:38

1:45

1:10

19:24

00:56

16:41

11:48

8:34

34:28

2:08

10:48

31:47

9:44

1:02:42

25:40

9:27

2:34

11:11

1:39

7:06

11:04

4:25

2:36

3:13

6:36

5:44

6:11

3:41

14:16

2:33

10:31

4:13

1:39

50:44

4:16

2:43

4:31

1:49

2:50

1:15

3:37

1:03:10

7:34

5:35

2:47

8:42

7:41

4:07

4:06

2:20

1:26