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.
 

Luckily, no one was injured