I supposed if I was in his shoes, no front wheel... I would grip my hands around bike + trolley handle together loh..
I suppose also can rest the bike handle on top of the trolley handle, to let the weight be support by trolley... It was fortunate that trolley's hind wheels are located far back enough for him, or else with the weight of bike and man the empty trolley can flip up and overturn. Then this guy will go to A & E for stitches..