Villians pushes on the flop

[El Maximo]

I've been playing NL SnG's for 3 months after cutting my teeth on limit ring games. I'm starting to play NLHE ring to improve my post flop skills and work off some bonuses. Here are a few hands from today where the villians pushed a flop that I had top pair or an overpair. These are all from the Party $25 NL Tables. Without any reads on the villians how would you play these flops?

Hand #1
Party Poker No-Limit Hold'em, $ BB (8 handed) converter

UTG+1 ($24.45)
Hero ($39.42)
MP2 ($24.75)
CO ($151.24)
Button ($74.9)
SB ($10.8)
BB ($23.75)
UTG ($14.07)

Preflop: Hero is MP1 with A[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $0.25.
<font color="#666666">1 fold</font>, UTG+1 calls $0.50, <font color="#CC3333">Hero raises to $3</font>, <font color="#666666">5 folds</font>, UTG+1 calls $2.50.

Flop: ($6.75) 2[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets $6</font>, UTG+1 pushed all-in ($15.45), Hero ??

Hand #2
Party Poker No-Limit Hold'em, $ Hero (10 handed) converter

SB ($16.5)
Hero ($24.25)
UTG ($40.9)
UTG+1 ($55.55)
UTG+2 ($25.45)
MP1 ($43.55)
MP2 ($25)
MP3 ($14)
CO ($0)
Button ($22.75)

Preflop: Hero is BB with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $0.25. MP3 posts a blind of $0.5.
<font color="#666666">5 folds</font>, MP3 (poster) checks, <font color="#666666">1 fold</font>, SB (poster) completes, <font color="#CC3333">Hero raises to $1.5</font>, <font color="#666666">1 fold</font>, SB calls $1.50.

Flop: ($4.50) 8[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets $3</font>, <font color="#CC3333">Hero raises to $6</font>, SB pushes all-in ($8.50), Hero ??

Hand #3
Party Poker No-Limit Hold'em, $ BB (10 handed) converter

UTG+1 ($8.75)
UTG+2 ($36.55)
Hero ($44.9)
MP2 ($28.7)
MP3 ($25.05)
CO ($17)
Button ($24.75)
SB ($4.92)
BB ($47.07)
UTG ($85.45)

Preflop: Hero is MP1 with Q[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $0.25.
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $2</font>, <font color="#666666">2 folds</font>, CO calls $2, <font color="#666666">2 folds</font>, BB calls $1.50.

Flop: ($6.25) 7[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets $5</font>, MP3 pushes all-in ($10), Hero ??