The car bonnet would be sticky so that if it hit a person, they would stick to the car.
This would stop the them falling back onto the road after the collision, which could injure them even more.
Google's idea is aimed at driverless cars but could be used on regular cars too.
Don't worry, the sticky layer would be covered by a special coating, so flies wouldn't get stuck to the car too.
It is just an idea at the moment but it could be something we see on our roads in the future!

Mandy and Pete Garland, from Weston-super-Mare, said their home address, phone numbers and flight dates were shared by Thomson in an email.
Thomson apologised for the error.
The Information Commissioner's Office (ICO) said it had investigated and was taking no further action.
Mr and Mrs Garland were among 458 customers whose booking details were shared on 15 August.
The couple booked a two-week trip to the Dominican Republic in January but later received a balance reminder email with a spreadsheet attached which included details of almost 500 customers from "Scotland to Cornwall", Mr Garland said.
"My biggest worry was how many people on that list are going to be prepared to show those details?
"Anybody with a little bit of brains would be able to look at the list and go 'there's a pretty good chance that house is going to be empty for at least a week'.
"So my biggest concern was the security of the house."
A Thomson spokesman said the email was "identified very quickly and recalled".
The couple said they had received "no apology and no money back". They said rescheduling their holiday "was not an option" as their jobs did not give them that flexibility.

Jobbik came second in 18 out of 19 counties, ahead of the Socialists, as in the May European elections.
It won control of 14 towns and villages. The party has been accused of anti-Semitic and anti-Roma rhetoric.
Fidesz won all but six districts of the capital Budapest, where its mayoral candidate Istvan Tarlos was re-elected.
It has a two-thirds majority in the national parliament and the local election consolidated its grip over the country's politics. It came top in nearly all the big towns and cities.
Jobbik is the third-largest party in Hungary's parliament and has three MEPs. It has tried to soften its image recently, but remains committed to defending conservative Hungarian values and thwarting integration of Roma communities, many of whom are desperately poor and marginalised.
The BBC's Nick Thorpe in Budapest writes:
"From 2018, Jobbik will govern this country," Jobbik leader Gabor Vona told cheering supporters in Budapest as the election results came in.
But he faces an uphill task to overtake Fidesz. His main problem is that Prime Minister Orban has stolen most of his Eurosceptic clothes.
Jobbik did well in this election, but not as well as it hoped. In 18 of 19 counties, it came second to Fidesz, proving that it now has nationwide support.
In the countryside, Jobbik won five towns and nine villages, up from one town and three villages in 2010. Most spectacularly, it won narrowly in the northern industrial town of Ozd, which has a large Roma population.
Jobbik's initial success was largely based on its ability to tap into widespread fear of the Roma in the Hungarian countryside.
In all three  elections this year - parliamentary, European and municipal - it has considerably toned down its rhetoric. It is now trying to appeal to middle-class voters who have abandoned Fidesz, as their standard of living stagnates and their children leave to work abroad.
Google's got a new idea to keep pedestrians safer on the roads - having sticky cars!
[NEXT_CONCEPT]
A couple whose personal details were revealed in a data breach by holiday company Thomson have cancelled their Caribbean trip over fears they could be burgled while away.
[NEXT_CONCEPT]
The far-right Jobbik party in Hungary has made gains in local elections won convincingly by Prime Minister Viktor Orban's ruling nationalist Fidesz.