Glad you're ok, bro. Lack of air, whether it's a grab loop inside the skirt or getting pushed down repeatedly in a recirc hydraulic, is no fun and can bring some perspective to things.
Spooky when it happens, for sure. Assuming you're heading back out, you might practice blowing the skirt while underwater by placing both hands behind you and pushing against the back deck just behind the cockpit combing. I've got some tight neoprene but by rolling forward while handpressing the back deck, they will all blow the skirt.
I've had students slip the grab loop inside the boar before. We started slipping duct taped wiffle (sp?) balls around the grab loop to remind them and give a larger fixture to grab when bailing out of the boat.
Forced exit was one of the first reasons I stopped wearing "water sandals" in a kayak. Though most kayaks nowadays use movable bulkheads rather than footpegs, it is easy to get a sandal strap caught on your way out. Dive booties are a much better alternative when in the boat.
Glad you're safe, buddy. :thumbup: