Every time David Arquette launches off the top rope, his family cringes inside ... 'cause the actor-turned-wrestler's sister tells TMZ Sports his new career scares the hell outta her!!
We spoke with Golden Globe-winner Patricia Arquette about David's new, more bloody career as a pro wrestler ... and she says he's got her full support ... even if she's too scared to watch him perform.
"It scares me a little bit. We're all scared as a family," Patricia says. "But also, I know this is David's life and David is an eccentric, wonderful, incredible person and it's his path.