Foudroyante (Jumping seconds or hand) (Flying seconds)
Foudroyante (seconde ou aiguille) | フドロワイヤント | 跳秒指针（跳秒或跳秒指针）（跳秒）
On a Chronograph, a hand that makes one rotation every second, pausing four, five, even eight times to indicate quarters, fifths or eighths of a second.
Also called foudroyante.