We'd say don't try this one at home, but it's unlikely many people would be brave/skilled/crazy enough to attempt to climb the roof of a football stadium (please don't take that as a challenge).
In the clip above -- skip to 3.40 in -- some British YouTubers from the channel Night Scape appear to sneak into the Olympic Stadium (now home to West Ham Football Club). They sit in the eerily silent seats, then slide through a gap at the top of the stands and make their way to the roof.
Needless to say, the rest of the clip is probably best avoided if you're not a fan of heights.
