It might seem like a cool & comfortable thing to do in the summer - sit in the front passenger seat of a vehicle with your feet on the dash...but if you do this habitually or simply occasionally, have a look at the following article on Driver.ca. 

https://driving.ca/auto-news/news/x-ray-from-car-crash-reminds-passengers-to-keep-feet-off-dashboard?fbclid=IwAR1CacmANMtgLZvo0X5QaZGr8NscHPUU99Y5pNi82xoO6FRFhtCt1zY1thI

When seated like this, serious injuries can happen if the air bags deploy in a collision.