a group of people water surfing in a river-like setting
are they being pulled by a boat
no
is there more than 2 people
yes
is this a river
yes
are any people standing around
yes
can you see the shore
yes
is there tubes to float in
no
what type of surfing are they doing
water surfing
oh so people are surfing the waves
yes
do they have life jackets on
no
are they on full size surfboards
yes