2 adjectives to describe holdin

I looked for my knife to cut it, but it had, somehow, got overboard in our flight, besides flyin' about at the rate of sixty mile an hour, kept a fellow pretty busy holdin' on, keepin' his place in the boat.

"I caught one glimpse of him holdin' tight with both hands to a shelf, with his eyes jumpin' out of his head and his face as white as flour.

2 adjectives to describe  holdin