Is this a bad semibluff?

[SNOWBALL138]

***** Hand History for Game 1830295906 *****
NL Hold'em $10 Buy-in + $1 Entry Fee Trny:10924679 Level:1 Blinds(10/15) - Friday, April 01, 22:36:37 EDT 2005
Table Table 11535 (Real Money)
Seat 10 is the button
Total number of players : 10
Seat 9: sykotik489 ( $950 )
Seat 5: KidCirhosis ( $800 )
Seat 8: DocPoker ( $900 )
Seat 6: badgrandpa1 ( $800 )
Seat 10: RedBloch ( $775 )
Seat 7: Sugar7878 ( $725 )
Seat 1: rbwilso1 ( $785 )
Seat 4: kockring1 ( $785 )
Seat 2: eyetwenty ( $800 )
Seat 3: WEAVER29 ( $680 )
Trny:10924679 Level:1
Blinds(10/15)
** Dealing down cards **
Dealt to RedBloch [ Ac Kc ]
>You have options at Table 35318 Table!.
WEAVER29 folds.
kockring1 folds.
>You have options at Table 35318 Table!.
KidCirhosis folds.
badgrandpa1 folds.
Sugar7878 folds.
DocPoker calls [15].
sykotik489 folds.
RedBloch raises [70].
rbwilso1 calls [60].
eyetwenty folds.
DocPoker calls [55].
** Dealing Flop ** [ 4s, 9c, 7c ]
rbwilso1 checks.
DocPoker checks.
RedBloch is all-In [705]
rbwilso1 folds.
DocPoker folds.
RedBloch does not show cards.
RedBloch wins 930 chips
>You have options at Table 35318 Table!.