Please don’t do this.
Ask anyone who knows me and they will tell you I have a few pet peeves. One of them is adult drivers displaying obvious disregard for the safety of their passengers by allowing front seat occupants to place their feet on the dash board.
In case you didn’t know, or forgot, cars and light trucks built after September 1, 1998, have a passenger side airbag waiting to deploy from the dash board.
With an impact of approximately 15 mph, it will instantaneously inflate towards the passenger. That means the passenger with feet on the dash will be explosively folded in half like a mishandled hard shell taco. Is that going to cause injuries of a severe nature? Probably. The required safety gizmo is now going ruin or end the life of the passenger.
If you are the operator of the vehicle, that is on you.
Adult size humans seated in the front seat of a car should be at least 10 inches away from the airbag canister to allow room for inflation. They should be seated upright with thier back in contact with the seat and wearing a seatbelt in order to remain centered in front of the airbag. Please note that even with proper deployment and a restrained passenger, there can still be injuries, but hopefully they will be limited to bruises and superficial burns.
…End of Dad Speech.