It's that word again: porpoising.
It was hoped that we'd seen the last of it, as F1 fans, but unfortunately it may be making a very unwelcome return for 2023.
Whilst most cars look more settled compared to last year's challengers, Ferrari in particular has shown the issues look set to play a part this year.
The SF-23 was visibly bouncing in a straight line, although it is as yet unclear whether this was aero or mechanical bouncing.
Obviously this is the very first run of the new cars around competitors so there is still some time to tackle problems early before the new season starts next week.
For Ferrari, though, the porpoising seems to have returned and the Italian team looks to have a lot of work to have a hope of resolving it before the start of the first race.
READ MORE: Ferrari nose develops dent in first F1 testing session
The Porpoising Horse
Due to copyright restrictions, we cannot show video of the bouncing Ferrari, but videos of Sainz's bumping car are circulating on social media
On Twitter, fans reacted to the bumping and bouncing with great gusto – and they are sure that porpoising is back for good.
Teams adapting to 2023 technical regulations
It should be stated at this point, teams are still acclimatising to the new floor regulations with the rear section ride height raised compared to last year.
A technical directive was introduced midway through last year's championship to try and negate the effects of the issue but with ground effect aerodynamics, porpoising is impossible to completely eliminate.
It has returned with a vengeance though for a number of teams and drivers, most notably in Carlos Sainz's Ferrari on day one of testing although the Alpine also bounced noticeably on the Bahrain International Circuit track.
It's also worth noting that car set-ups are kept secret at this stage, so time will tell how much of an issue porpoising should prove to be for Ferrari and everyone else.
READ MORE: Wolff confirms NO PORPOISING for Mercedes to start test
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