We've all seen this happen on public transport - an able-bodied young person sitting in the priority area on a bus.
Usually, they have the common sense to offer up the seat to an older or impaired person who boards – but not always.
This video, which has become widely popular in China, shows a young man seated in the "yellow area" on a bus in Wuhan - the special area for impaired users.
When the young man apparently refused to give up his seat, an older man was less than happy - and begins shouting at him, before moving to a physical confrontation where he is hit several times.
The youngster quickly finds himself outnumbered by the older passengers once he stands up to take a confrontational stance.
The BBC reports that the confrontation was actually on behalf of another man standing nearby, which may explain why a man capable of physical confrontation might need the seat.
It's believed police diffused the situation and no arrests followed.
The incident took place at about 1pm on September 4 in Wuhan, and has sparked debate about whether such customs are voluntary acts or should be an entitlement.
That debate is further complicated by a generational divide in China where, thanks to a long-standing one-child policy, older citizens outnumber youth - an unusual demographic situation.