People taking part in fundraising events and marathons often bravely (or stupidly) decide it's a great idea to do so dressed up as something weird or wonderful.
Whether it's to make it more of a challenge or to encourage friends and family to dig a little deeper into their pockets when it comes to fundraising, they often look like they regret the decision about halfway around the course.
One man probably ended up questioning his outfit choice for a half marathon when he had to run through a wind tunnel.
Unsurprisingly, things didn't go well when he was almost blown away by the wind and other runners had to push the huge costume back in the right direction.
A spectator watching The Vitality Big Half spotted the runner in Canary Wharf and took a video of the hilarious moment.
He shared it on Twitter with the caption: "Hilarious Big Half scenes this morning when a bloke dressed as Big Ben hadn't fatored in his additional surgace area when trying to run through the Canary Wharf wind tunnel.
"Time standing still."
With the help of other runners he manages to get to a slightly sheltered part of the track and manages to start running again - just.
People found the video hilarious and were quick to comment online.
One wrote: "The obvious solution is is to put his head down, point to the front and charge, thus taking advantage of the streamlined and aerodynamic shape."
Another added: "I'm disappointed s/he didn't have the current scaffolding on the outfit."