The joke here is multi-layered, like an onion made of pure irony. Internet Explorer, famously the slowest browser known to mankind, has a Twitter handle "@TheFastest" while reporting on an AWS outage. But the real punchline? The tweet is dated April 1st, 2019, has supposedly 94.8M retweets (more than any tweet in history), and Internet Explorer wouldn't even know about an outage until three years after it was fixed. It's like watching a tortoise report breaking news.