you should try the Uni BUSA events 😉
Race "compare", raking slurry and mud into the XC course to make people fall off (super fly si patton though, and hes a top knob, so kind of expected)
"supporters" with air horns hiding in the bushes and behind the bridge crossing (cwmcarn)
90% of people find it quite funny, 8% dont (tee hee), 2% fall off in shock. 😳
and the best one i saw/was involved in on an XC race was on a paticularly long , swooping Berm at cwmcarn, where pretty much any speed could be carried through it, depending on confidence, there were about 50+ supporters with arm chairs and beers and rattles and horns and all sorts of paraphanalia, cheering everyone on, (you could hear them from right down the bottom of the valley).
excessive whooping and shouting was funny, but when a Leeds uni rider (they have a bit of a reputation for taking it too seriously) was spotted, everyone stood, perfectly still, in absolute mournful silence, just the gentle tinkle of the Jey bike clattering by.
it was a very "awkward moment" for the Leeds riders 😉