Wearing a helmet or not at this speed (77 mph) won't change a lot I guess if they fall...

By the way, one of them is Evandro Portela, a professional cyclist who was won several titles in the past.

Worst mother of the year?
 

There's also this funny one with Zachary Quinto:
It’s Spock (Zachary Quinto)! Do You Care?

Answer: 80!

She didn't like being told to slow down so she went 70 instead of 35, logic!

I think it's safe to say she didn't pass her driving test also.

NSFW: lots of swearing

Cat couldn't' care less...

One day...

How can they keep a straight face? It's not even March and we already have the craziest news story of the year.

Logan Paul's back with more insane Vines..

Also:

College dude's funny and crazy Vine videos - part 1

A funny collection of Vines by Jordan Burt

Zach King's 'magic' Vines compiled in one video

American rock climber Alex Honnold attempts the first free solo ascent of El Sendero Luminoso, a 1,500 foot (457m) big wall near Monterrey, Mexico. Of course, he's climbing this one without safety gear!

A Subaru towing a sled speeds up to 155km/h (96 mph) on Russian snowy roads

A good load of short, funny and crazy entertaining videos

Also:

Zach King's "Magic" Vines Compiled in One Video

Best Vines of Last Week

I hope for them he doesn't play and chase like your average cat...

27 crazy Vines for your entertainment

This match opposing Jean-Michel Saive to Chuang Chih-Yuan starts like any normal professional table tennis match but quickly turns into pure craziness!

A bit long, but totally worth your time
 

This was filmed in Czech Republic. It is said they do it to cure acrophobia, the fear of heights.