Carlos Sainz vented his anger with his Ferrari team after a miscommunication in the Las Vegas Grand Prix.
The Spaniard driver was running towards the front but called for a second pit-stop midway through the 50-lap race.
Sainz was told to pit - and lined up to do so - before Ferrari called off the pit stop late in the day.
Sainz, who is being replaced by Lewis Hamilton at Ferrari next year, pitted a lap later.
A bemused Sainz asked "What happened?' and when told that his mechanics were "not ready", Sainz replied: "Wake up guys!"
Sainz looked like he crossed the white line on pit entry, too, but was not punished by the race stewards.
Sainz started in second place but dropped back to third at lap one after being overtaken by teammate Charles Leclerc.