I didn't watch that game where he made 75 of 36 balls, but looking at the scorecard he walked in the 9th over, when B'lore were 31/4, which means that they had to get 167 or so of 12 overs .... thats RRR of around 14
End of over 9 (2 runs) - Bangalore Royal Challengers 33/4 (165 runs required from 11 overs, RR: 3.66, RRR: 15.00)
End of over 10 (5 runs) - Bangalore Royal Challengers 38/4 (160 runs required from 60 balls, RR: 3.80, RRR: 16.00)
End of over 11 (4 runs) - Bangalore Royal Challengers 42/5 (156 runs required from 54 balls, RR: 3.81, RRR: 17.33
End of over 12 (8 runs) - Bangalore Royal Challengers 50/5 (148 runs required from 48 balls, RR: 4.16, RRR: 18.50)
End of over 13 (19 runs) - Bangalore Royal Challengers 69/5 (129 runs required from 42 balls, RR: 5.30, RRR: 18.42) .... the over where they actually keep up with the RRR
End of over 14 (4 runs) - Bangalore Royal Challengers 73/7 (125 runs required from 36 balls, RR: 5.21, RRR: 20.83)
End of over 15 (10 runs) - Bangalore Royal Challengers 83/7 (115 runs required from 30 balls, RR: 5.53, RRR: 23.00)
End of over 16 (6 runs) - Bangalore Royal Challengers 89/8 (109 runs required from 24 balls, RR: 5.56, RRR: 27.25)
End of over 17 (18 runs) - Bangalore Royal Challengers 107/8 (91 runs required from 18 balls, RR: 6.29, RRR: 30.33)
End of over 18 (7 runs) - Bangalore Royal Challengers 114/8 (84 runs required from 12 balls, RR: 6.33, RRR: 42.00)
End of over 19 (4 runs) - Bangalore Royal Challengers 118/9 (80 runs required from 6 balls, RR: 6.21, RRR: 80.00)
End of over 20 (14 runs) - Bangalore Royal Challengers 132/9 (66 runs required from 0 balls, RR: 6.60)
then they take 18 runs [RRR 30.33] in the 17th over when the game is already gone, then again 14 in the last over
scoring when there is no pressure to win and when you can pick the balls that you can hit is not good enough for me