it looked like a part of a bench, probably extra passengers can sit on it for a good open aerial view of the road ahead...

or

sampayan, he should get stronger clips next time or else lose his laundry on edsa

or

dating billboard frame, or what's left after Milenyo weeks ago

or

insect/bug catcher device

or

special antennae/ sonar rig for satellite reception (you should see his entertainment system)

but one thing for sure

he likes attention and he surely got ours, yes?