Make it an express so you and your fellow riders have some time alone, without any doors opening or making room for new riders. During that long rise to the first stop, just stand perfectly still and let out a long, throaty
"fffffuuuuuuuck..." Maybe you can punctuate it with a gust of hot breath against the back of the neck before you. Or if you want to be less mysterious and more wacky, start rifling through your bag and let loose:
"SHIT PISS COCKSUCKER FUCK!FUCK!FUCK!" You're gonna put a smile on a lotta people's faces.