Susan (Joe's mum) attempts to turn off a tennis ball machine (which spilled over), but then the class hamster (conveniently called "Gagarin") is accidentally shot up her anus (the low angle shot of underneath her skirt is covered by an image of outer space as the hamster is flying towards her anus) synched to "Also Sprach Zarathrusta". She moans in pain as the class and the parents wince. Played for laughs.
Alfie goes on a zipwire. Just before he jumps, Mitchell pulls down Alfie's trousers, revealing Alfie's naked lower body. His bottom is briefly shown.
Alfie takes his class to a strip club, where a one-legged woman and Stephen dance seductively, but neither undress. No nudity at ALL.
A box full of sex toys is shown and they're used as weapons. This includes sex dolls, whips, face masks, a dildo, and anal beads. Brief and not very inappropriate
While being lifted by a helicopter, a man tries to grab onto Alfie, only resulting on his trousers being pulled down again. His bottom is shown and his penis is briefly visible for at most, a brief half a second.