Lewis Hamilton claimed his third Formula One title with a win in the US Grand Prix on Sunday.
Hamilton just edged out teammate Nico Rosberg to take first place.
After the race, there was a little bit of tension between the two as they waited in the holding room. Hamilton threw Rosberg's podium cap towards the German, who promptly sent it back in the English driver's direction.
The tension possibly stemmed from a moment early in the race. Going into the first corner, Hamilton appeared to nudge Rosberg - who had been in pole position - off the track, dropping him to fourth place. Rosberg stated after the race that he believed the move to be 'extremely aggressive'.
Rosberg had managed to regain the lead but a mistake late in the race cost him the chance of victory.