Cruelty to Animals
Where we were set upon by wasps. Not just the one, not two, but three. My sister's boyfriend headed off for beermats, and the plot was hatched. We considered it quite a coup to have trapped one wasp in my glass:

We would've happily left it at that, but then a second of them took a shine to Alexis's It's-Pepsi-Is-That-Okay - so we got this:

So we had two wasps, one quite angry at being unable to escape its imprisonment, the other slowly drowning in sickly sweet dark sugary liquid. More fun, we decided, would be to get both wasps reunited - so we did:

For those of you worried that we left them to their fate, I'd like to put your minds at rest. The wasps were removed from the It's-Pepsi-Is-That-Okay and squashed beneath a beermat.
Then we came home via McDonald's Drive-Thru.