<s>
An	O
on-ride	B-Algorithm
camera	I-Algorithm
is	O
a	O
camera	O
mounted	O
alongside	O
the	O
track	O
of	O
a	O
roller	B-Device
coaster	I-Device
,	O
log	O
flume	O
or	O
other	O
thrill	O
ride	O
that	O
automatically	O
photographs	O
all	O
of	O
the	O
riders	O
on	O
each	O
passing	O
vehicle	O
.	O
</s>
<s>
Often	O
specialty	O
products	O
,	O
such	O
as	O
posters	O
,	O
keychains	B-Application
or	O
t-shirts	O
,	O
are	O
available	O
also	O
.	O
</s>
<s>
An	O
unusual	O
camera	O
configuration	O
can	O
be	O
found	O
on	O
the	O
hydraulically	O
launched	O
roller	B-Device
coasters	I-Device
Top	O
Thrill	O
Dragster	O
at	O
Cedar	O
Point	O
and	O
Kingda	O
Ka	O
at	O
Six	O
Flags	O
Great	O
Adventure	O
.	O
</s>
<s>
Both	O
had	O
two	O
cameras	O
(	O
Kingda	O
Ka	O
's	O
second	O
on-ride	B-Algorithm
camera	I-Algorithm
has	O
since	O
been	O
removed	O
)	O
,	O
one	O
during	O
the	O
high-speed	O
launch	O
segment	O
and	O
another	O
at	O
the	O
final	O
brake	O
run	O
,	O
providing	O
riders	O
with	O
a	O
before	O
and	O
after	O
picture	O
of	O
themselves	O
on	O
those	O
harrowing	O
rides	O
.	O
</s>
<s>
Hydra	O
the	O
Revenge	O
is	O
also	O
the	O
only	O
roller	B-Device
coaster	I-Device
to	O
take	O
a	O
picture	O
while	O
the	O
rider	O
is	O
upside	O
down	O
.	O
</s>
<s>
On	O
some	O
rides	O
,	O
on-ride	O
videos	O
are	O
recorded	O
by	O
cameras	O
mounted	O
alongside	O
the	O
track	O
,	O
similar	O
to	O
on-ride	B-Algorithm
photo	I-Algorithm
cameras	O
.	O
</s>
