Hey guys, I'm currently practising ILs on Switch and I'm completely stumped by a strat in 1-2 Shipwreck Shore. The top players are doing what I can only assume is a grab jump straight out of the water roll to hit the ending barrel without having to go past it and double back by jumping on the bug, it clearly saves several seconds but I can't for the life of me figure out how to get it. Any tips?

Made a specific tutorial for it:

gl!

Thanks man, I searched youtube for tutes and couldn't find this for some reason