l love this thread - reminds me that I'm not the only complete twat out there

I've got a few: I'd travelled back from Uni to see my parents and the bus dropped me in the middle of town. Home was up three massive hills, so I thought I'd be cheeky and grab a taxi - only a couple of quid. It was pissing it down so all the more reason.
I hop in the front of a taxi outside the supermarket and say, "Just up the hill please.", at which point the driver responds, "Um...I'm not a taxi?" I look round and there's two kids weeping with laughter (little gits!) and a pile of shopping in the back; outside the door, his wife is waiting to get in, looking aghast. I walked home in shame.
Another time, I was waiting for my friends outside the pub after we'd had a couple of drinks - they were paying up and we were going to say our goodbyes and walk home our separate ways. I'm lurking in the porch, so when my friend comes out, I decide (sober, no fucking less) to jump out on her with a massive, open-mouthed "RAAAAARGH!!"
Only it's not her, is it? It's some random woman and her boyfriend. She goes, "WHAT THE FUCK?" and he looks like he's going to try and fight me any second. I swear, I nearly weed.