The Australian fast bowler Mitchell Johnson says he's shocked by his performance on the second day of the first cricket test against South Africa at the WACA in Perth.
The Proteas were 243 for 8 at stumps in reply to Australia's 375, after Johnson took seven for 42 including five wickets for two runs off 21 balls.
Johnson says a more aggressive attitude towards his bowling is paying off.
PLAY AUDIO:CRICKET AGGRESIVE
IN:......TRYING TO
OUT:...TEST MATCH
DUR:...15
