Ok, this is a microstake hand, but I was watching television when playing 1 table and this hand caught my interest. What if this wasn't microstakes and I was playing higher limits, what would be the right decision?

The hand:
Blinds: $0.01/$0.02
Stakes: $0.02/$0.02

Seating Arrangement:

VILLAIN is at seat 1 with $1.91.
tootsN1 is at seat 2 with $4.26.
Dini15 is at seat 3 with $0.95.
DER-NEUE is at seat 5 with $4.10.
kikiland is at seat 6 with $1.22.
Hatzfeld is at seat 7 with $6.04.
HERO is at seat 8 with $4.89.
Schummel is at seat 9 with $1.12.
kuyrsssttsj is at seat 10 with $1.80.

Post Blinds:

The button is at seat 8.
Schummel posts the small blind of $0.01.
kuyrsssttsj posts the big blind of $0.02.

Deal Pocket Cards:
HERO: Ad 5d

Pre-flop:
VILLAIN calls $0.02.
tootsN1 folds.
Dini15 folds.
DER-NEUE folds.
kikiland folds.
Hatzfeld folds.
HERO calls $0.02.
Schummel calls $0.01.
kuyrsssttsj checks.


Flop (As 5s 9s):
Schummel raises $0.02.
kuyrsssttsj calls $0.02.
VILLAIN raises $0.16.
HERO ???

Thanks in advance!