Dominic also praised his girlfriend, 90210 actress AnnaLynn McCord for rushing to his rescue and getting help for him.
He wrote: "Thank god my love @theannalynnemccord was there when my unfortunate accident occurred on set. She went into raging #momma mode along with #christinanorthup and got me the right care. Show goes on. No worries !!! Oh being airlifted out on a helicopter was another adventure I didn't expect. Thought the bloody thing was going to fall from the sky!!! What a day it was. Grateful to be alive (sic)."
Dominic and AnnaLynn, 28, recently rekindled their romance, one year after they called time on their relationship of three years, when they reconnected following his skin cancer diagnosis.
She previously explained: "I came back into his life as his friend, and I took him to his doctor's appointments and I was there with him because whether or not he knew it, I love him. One of the things he said was, 'You really love me, don't you?' I was like ... 'Oh my God. Are you kidding me? Are you kidding me? After all this time, you still don't know that? I gave up all my 20s for you!'"
- Bang! Showbiz