The sliproad is a bit steep and invariably has two lanes of stop-start traffic in what's marked as only a single lane, so it's good practice for hill starts and clutch control. So far I've only stalled a couple of times on it! I must admit, I do cheat a bit and let the Alfa's hill holder deal with it when properly on the slope (though I do have to watch out at the bottom and top of the sliproad as it doesn't activate on slight slopes - fortunately in my car I can hear a whine from presumably the brake assist pump when it's engaged).
Anyway, today's fun was at the middle of the roundabout on a rather wet and wild evening. Having dodged cyclists (including one twice - I passed him, then he passed me while queueing at a set of lights), people zipping past just before two lanes merge into one, stealth ninja motorcyclists, and a police car blocking a lane of traffic (who moved on just as the traffic approached him, causing no end of confusion to the drivers that were about to overtake him), I then navigated the crazyabout and dropped down into the second roundabout, turned a corner half-way round and discovered a good couple of inches of water stretching across the road. Fortunately I'd already slowed before reaching it as it's immediately before a set of hidden lights, but it was rather disconcerting to find the road replaced by a rather large puddle! I'll have to remember to watch out for that spot after heavy rain, especially if there's a storm surge - there's a river running through the roundabout which is just about tidal, and it's known to flood in extreme conditions.