I think the original intent here was that Mason would say the production survived various disasters, and Les’ remark was meant to categorize his cameo among said disasters. It’s typical of this strip’s style of “humor,” which is either self-depreciation or a dreadful pun. It’s also typical in that it turns real life suffering into a moment for a horrible person (Les, in this case) to smirk about how he sure suffered too.
But the way Mason’s sentence is built, it sure looks like Les is claiming his cameo is “stellar work.” In which case, ego much, douchebag? Your cameo took take after take, frustrated and angered everyone involved, and actually drove up the budget.
If that’s not the case, then once again Tom Batiuk is taking overweening pride in that which does not exist: his writing ability. He could have taken an extra five minutes and constructed Mason’s dialogue to fix the “joke.” Conversely, I suppose his editors could have fixed it for him, but they’re too busy having a picnic with Bigfoot and Mothman.