A better visualisation of segwit txs would be passangers leaving their luggage (witness part) on a trailer attached to the bus, and then boarding the bus with the legacy txs.
Maybe could show the miners carrying all of the valuable stuff on their burdened, hard-working shoulders while users turn up their noses and throw rotten fruit at the support structure
I'd also want to portray how their segregated signatures relies on trusting in the good will of miners (While at the same time seem to be hating on miners and distrustful of them) 1/2