Air is put into a bladder

2 mins 47 secs

40 secs

3 mins 47 secs

1 min 36 secs

4 mins 41 secs

2 mins 35 secs

1 min 16 secs

2 mins 7 secs

1 min 23 secs

6 mins 4 secs

39 secs

2 mins 58 secs

4 mins 33 secs

6 mins 21 secs

9 mins 10 secs

26 secs

11 mins 28 secs

31 mins 42 secs

20 mins 6 secs

5 mins 42 secs

2 mins 57 secs

1 min 24 secs

6 mins 3 secs

5 mins

2 mins

1 min 30 secs