Top Gear presenter Jeremy Clarkson is facing new allegations over the "fracas" at a Yorkshire Dales hotel that led to his suspension by the BBC on Monday.
Four members of the same family who overheard the row say Clarkson told a colleague he would have him fired because there was no hot food at the end of a day's filming.
The Ward family from Leeds told Sky News that Clarkson ranted for up to half-an-hour at the Simonstone Hotel near Hawes and say they were shocked at his language and the way he treated his colleague.
They also claimed he criticised the BBC, saying it was "getting worse".
Sue Ward, 54, a medical receptionist, described Clarkson's behaviour towards the unnamed employee as shocking.
"He said he hadn't done his job properly, it was ridiculous that there was nothing to eat, obviously there was lots of expletives in between all this, and that he would be losing his job, he would see to it that he would lose his job," she said.
"Even someone who's really inept at their job should be told properly, in a proper manner," she said
"But the fact that it was in a public place, I didn't want to listen to that language."
Sue's brother in law Bob Ward, 60, said Clarkson arrived with his co-presenters by helicopter at around 9.30pm and refused to have his picture taken.
"I said 'Any chance of a selfie Jeremy?' and he said 'No, not with the day I've had today'."
Within minutes, Bob's wife Denise, 51, said Clarkson was shouting and swearing and had spoiled the evening they had been looking forward to.
"We were sort of, 'Ooh, celebrities, will we see them?' and then it was just the shock of how can someone be so rude?" she said.
"It was just the swearing and the length of time and this poor guy that he was ripping into," she added.
Top Gear is the BBC's biggest global brand, worth more than £50m a year, but with Clarkson suspended the next three episodes have been scrapped.
The only Top Gear fan among the Ward family, Sue's husband Alan, 56, agreed with the three quarters of a million people who have signed an online petition for Clarkson to keep his job.
"He's brash, we know what he's like, he's been in trouble before and I think he'll be in trouble again," he said.
"I think he'll continue to do that job because without Clarkson there's no Top Gear."
Sky News has approached Clarkson for a comment but he has not responded.
Meanwhile, it has emerged that Clarkson’s Twitter profile has changed from saying, "I am a presenter on the BBC2 motoring show, Top Gear" to "I am probably a presenter on the BBC2 motoring show, Top Gear".
One fan responded by tweeting "brilliant", while an opponent wrote "You'll soon be changing the verb tense in your profile then?"