I have two major problems with this:
1) The Lord's servant is to not supposed to be violent, but is supposed to be self-controlled:
1 Timothy 3:2 Therefore an overseer must be above reproach, ... sober-minded, self-controlled, respectable, ... 3 not a drunkard, not violent but gentle, not quarrelsome, not a lover of money.
Titus 1:7 For an overseer, as God's steward, must be above reproach. He must not be arrogant or quick-tempered or a drunkard or violent or greedy for gain, 8 but hospitable, a lover of good, self-controlled, upright, holy, and disciplined. 9 He must hold firm to the trustworthy word as taught,
2) The Bible clearly teaches that the Spirit works through the preaching of the word.
Acts 10:44 While Peter was still saying these things, the Holy Spirit fell on all who heard the word.
Acts 11:15 As I began to speak, the Holy Spirit fell on them just as on us at the beginning.
Ezekiel 37:4 Then he said to me, "Prophesy over these bones, and say to them, O dry bones, hear the word of the LORD. 5 Thus says the Lord GOD to these bones: Behold, I will cause breath to enter you, and you shall live.
3) Some have defended Bentley's actions by saying that Wigglesworth used to punch people when he healed them. This means nothing. We are not supposed to discern what Bentley is doing by looking at Wigglesworth - instead we are supposed to look at scripture.
4) Some have defended Bentley's actions saying that Jesus put mud on the blind man's eyes (John 9:6), and so this is precedent for what Bentley does. There are 2 clear ways to refutre this thinking:
a) Look at points 1 & 2 above.
b) Study the story of John 9:6, see what it is about, see why Jesus made the mud, and then see if that relates in any way to what Todd Bentley is doing.