F1 | Leyton House Racing Start-up Procedure

I've been to couple of race events already. If all goes as planned I am going to the 24 hours of Le Mans this year. But I've never seen a race-car starting procedure in this way. So I enjoyed it as a fan. And want to share it with you. Okay it's a f1-car from 1990. And not the most markable team. The team only excisted for 2 full years. (If you exclude the March years). But still it's something that is still done more or less in the same/slightly different way.