Weddings can be a stressful time - for every one involved.

But usually the biggest possible thing that goes wrong isn't actually that big. Sometimes, though, the one possible disaster that's been niggling at the back of your mind comes true. And it can be a nightmare. A recent Reddit thread posed the question: "What is the worst thing you've ever seen happen at a wedding?" And a few redditors who had been there, done that shared their tales of wedding woe - or at least, the most unexpected situations that took place on the big day. Check out seven of the craziest responses below.

The mum-in-law got very musical

"My mother in law handed out an EP of my now sister-in-law to as many guests as she could & threw a fit in the middle of the dance floor later that night because I didn’t let her daughter sing with the band or karaoke. Her exact words were, “How dare you make today all about you.” "It was MY wedding day." [via]

The ring bearer walked off a cliff

"My husband's brother having a seaside wedding. Our almost 2 year old was the ring bearer. "He passed off the rings to the best man (Dad), then toddled away. ...Off the cliff. "It was prob a 60-80' drop to the beach below, but he luckily got caught up in the bushes, and husband snatched him up. He was buckled into his stroller after that, kamikaze kid." [via]

The Man of Honour couldn't remember the groom's name

"During the 'Man of Hono[u]r' speech, the guy repeatedly said the name of the bride's ex instead of her new husband. Three times. "'When I first saw [Bride] and [Bride's ex], I knew they were perfect for each other'. Stuff like that. "And he caught himself, too, every time. He was insanely embarrassed... but he still did it three times throughout the speech. "It was so awkward watching it happen... probably the biggest social trainwreck I've ever seen." [via]

The best man went rogue during his wedding toast

"During the best man speech, the best man proposed to the maid of honor. "Totally stole the night from the bride and groom. "Now the best man and maid of honor are in the process of divorcing." [via]

The bridesmaid had a huge fashion faux-pas

"I was at a wedding where one of the bridesmaids had gotten married a month earlier and thought it was a good idea to change out of her dress into her wedding dress for the reception. "We in the wedding party told her to change back. "She refused to change out of her wedding dress until one of the other bridesmaids locked her in the bathroom and told her to change or it was going to get physical. "She changed and left not long after. The rest of the reception was a fantastic time." [via]

The bride's step-mum bit her mum.

"Bride's step-mother and mother got into a fight. Step-mother bit the mother. Wedding went to a screeching halt." [via]

The bouquet toss went horribly, horribly wrong.

"For the bouquet toss, a middle-aged guy forced his middle-aged girlfriend out onto the floor, then stood by her so she couldn't leave. "The bouquet was caught by an excited little girl. The guy proceeded to yank the bouquet out of the little girl's hands, gave it to his middle-aged girlfriend, then ran off the floor cheering loudly to high-five one of his buddies. "The little girl ran away crying." [via]