I read the Collin Moshman hu book and i have a question about the information found in chapter Calling Button Raises, pg 157

I have read that, if I call the raises from BU, on flop, (i am first to act) I can do 4 things: check-call, check-fold, check-raise and lead.

But I don't know what to do in situation like this:

[b][9/26][/b]
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PokerStars Game 88616250187 / Tournament
Table 637713805 1 -
Blinds : [b][color=darkred]10/20[/color][/b]
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2 players
[b][But]+[/b][b][SB] [/b]Misiek94 (760)
[b][BB] [/b][b]cmarian5 (2240) [/b]

cmarian5 J:diamond: 9:club: [b]Initial Pot: 30
[/b]
Misiek94 raises to 40
cmarian5 calls 20
### FLOP ### 5:diamond: A:heart: 3:club: [b]Pot: 80[/b]
cmarian5 bets 60
[i]Misiek94 folds[/i]
cmarian5 hide cards
[color=violet][b]cmarian5[/b][/color] wins 140 from the main pot

I am cmarian5, and I think lead is a good game for a bluff on this  flop. What do you think? How I shoud play in this situations? Villain is loose in BU.

Another exemple:

[b][17/26][/b]
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PokerStars Game 88616438930 / Tournament
Table 637713805 1 -
Blinds : [b][color=darkred]20/40[/color][/b]
##########################################

2 players
[b][But]+[/b][b][SB] [/b]Misiek94 (690)
[b][BB] [/b][b]cmarian5 (2310) [/b]

cmarian5 K:spade: 9:diamond: [b]Initial Pot: 60
[/b]
Misiek94 raises to 80
cmarian5 calls 40
### FLOP ### 2:diamond: Q:club: 8:heart: [b]Pot: 160[/b]
cmarian5 checks
Misiek94 bets 100
cmarian5 calls 100
### TURN ### 6:heart: [b]Pot: 360[/b]
cmarian5 checks
Misiek94 bets 200
[i]cmarian5 folds[/i]